diff --git a/keyserver/src/responders/website-responders.js b/keyserver/src/responders/website-responders.js
index c90753b82..ca0674214 100644
--- a/keyserver/src/responders/website-responders.js
+++ b/keyserver/src/responders/website-responders.js
@@ -1,808 +1,813 @@
 // @flow
 
 import html from 'common-tags/lib/html/index.js';
 import { detect as detectBrowser } from 'detect-browser';
 import type { $Response, $Request } from 'express';
 import fs from 'fs';
 import _isEqual from 'lodash/fp/isEqual.js';
 import _keyBy from 'lodash/fp/keyBy.js';
 import * as React from 'react';
 // eslint-disable-next-line import/extensions
 import ReactDOMServer from 'react-dom/server';
 import t from 'tcomb';
 import { promisify } from 'util';
 
 import { baseLegalPolicies } from 'lib/facts/policies.js';
 import stores from 'lib/facts/stores.js';
 import { daysToEntriesFromEntryInfos } from 'lib/reducers/entry-reducer.js';
 import { freshMessageStore } from 'lib/reducers/message-reducer.js';
 import { mostRecentlyReadThread } from 'lib/selectors/thread-selectors.js';
 import { mostRecentMessageTimestamp } from 'lib/shared/message-utils.js';
 import {
   threadHasPermission,
   threadIsPending,
   parsePendingThreadID,
   createPendingThread,
 } from 'lib/shared/thread-utils.js';
 import { defaultWebEnabledApps } from 'lib/types/enabled-apps.js';
 import { entryStoreValidator } from 'lib/types/entry-types.js';
 import { defaultCalendarFilters } from 'lib/types/filter-types.js';
 import { inviteLinksStoreValidator } from 'lib/types/link-types.js';
 import {
   defaultNumberPerThread,
   messageStoreValidator,
 } from 'lib/types/message-types.js';
 import { defaultEnabledReports } from 'lib/types/report-types.js';
 import { defaultConnectionInfo } from 'lib/types/socket-types.js';
 import { threadPermissions } from 'lib/types/thread-permission-types.js';
 import { threadTypes } from 'lib/types/thread-types-enum.js';
 import { threadStoreValidator } from 'lib/types/thread-types.js';
 import {
   currentUserInfoValidator,
   userInfosValidator,
 } from 'lib/types/user-types.js';
 import { currentDateInTimeZone } from 'lib/utils/date-utils.js';
 import { ServerError } from 'lib/utils/errors.js';
 import { promiseAll } from 'lib/utils/promises.js';
 import { defaultNotifPermissionAlertInfo } from 'lib/utils/push-alerts.js';
 import { infoFromURL } from 'lib/utils/url-utils.js';
 import { tBool, tNumber, tShape, tString } from 'lib/utils/validation-utils.js';
 import getTitle from 'web/title/getTitle.js';
 import { navInfoValidator } from 'web/types/nav-types.js';
 import { navInfoFromURL } from 'web/url-utils.js';
 
 import { fetchEntryInfos } from '../fetchers/entry-fetchers.js';
 import { fetchPrimaryInviteLinks } from '../fetchers/link-fetchers.js';
 import { fetchMessageInfos } from '../fetchers/message-fetchers.js';
 import { hasAnyNotAcknowledgedPolicies } from '../fetchers/policy-acknowledgment-fetchers.js';
 import { fetchThreadInfos } from '../fetchers/thread-fetchers.js';
 import {
   fetchCurrentUserInfo,
   fetchKnownUserInfos,
   fetchUserInfos,
 } from '../fetchers/user-fetchers.js';
 import { getWebPushConfig } from '../push/providers.js';
 import { setNewSession } from '../session/cookies.js';
 import { Viewer } from '../session/viewer.js';
 import { streamJSON, waitForStream } from '../utils/json-stream.js';
 import {
   getAppURLFactsFromRequestURL,
   getCommAppURLFacts,
 } from '../utils/urls.js';
 import { validateOutput } from '../utils/validation-utils.js';
 
 const { renderToNodeStream } = ReactDOMServer;
 
 const access = promisify(fs.access);
 const readFile = promisify(fs.readFile);
 
 const googleFontsURL =
   'https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=Inter:wght@400;500;600&display=swap';
 const localFontsURL = 'fonts/local-fonts.css';
 async function getFontsURL() {
   try {
     await access(localFontsURL);
     return localFontsURL;
   } catch {
     return googleFontsURL;
   }
 }
 
 type AssetInfo = {
   +jsURL: string,
   +fontsURL: string,
   +cssInclude: string,
   +olmFilename: string,
   +sqljsFilename: string,
   +opaqueURL: string,
 };
 let assetInfo: ?AssetInfo = null;
 async function getAssetInfo() {
   if (assetInfo) {
     return assetInfo;
   }
   if (process.env.NODE_ENV === 'development') {
     const fontsURL = await getFontsURL();
     assetInfo = {
       jsURL: 'http://localhost:8080/dev.build.js',
       fontsURL,
       cssInclude: '',
       olmFilename: '',
       sqljsFilename: '',
       opaqueURL: 'http://localhost:8080/opaque-ke.wasm',
     };
     return assetInfo;
   }
   try {
     const manifestString = await readFile('../web/dist/manifest.json', 'utf8');
     const manifest = JSON.parse(manifestString);
     const webworkersManifestString = await readFile(
       '../web/dist/webworkers/manifest.json',
       'utf8',
     );
     const webworkersManifest = JSON.parse(webworkersManifestString);
     assetInfo = {
       jsURL: `compiled/${manifest['browser.js']}`,
       fontsURL: googleFontsURL,
       cssInclude: html`
         <link
           rel="stylesheet"
           type="text/css"
           href="compiled/${manifest['browser.css']}"
         />
       `,
       olmFilename: manifest['olm.wasm'],
       sqljsFilename: webworkersManifest['sql-wasm.wasm'],
       opaqueURL: `compiled/${manifest['comm_opaque2_wasm_bg.wasm']}`,
     };
     return assetInfo;
   } catch {
     throw new Error(
       'Could not load manifest.json for web build. ' +
         'Did you forget to run `yarn dev` in the web folder?',
     );
   }
 }
 
 let webpackCompiledRootComponent: ?React.ComponentType<{}> = null;
 async function getWebpackCompiledRootComponentForSSR() {
   if (webpackCompiledRootComponent) {
     return webpackCompiledRootComponent;
   }
   try {
     // $FlowFixMe web/dist doesn't always exist
     const webpackBuild = await import('web/dist/app.build.cjs');
     webpackCompiledRootComponent = webpackBuild.app.default;
     return webpackCompiledRootComponent;
   } catch {
     throw new Error(
       'Could not load app.build.cjs. ' +
         'Did you forget to run `yarn dev` in the web folder?',
     );
   }
 }
 
 const initialReduxStateValidator = tShape({
   navInfo: navInfoValidator,
   deviceID: t.Nil,
   currentUserInfo: currentUserInfoValidator,
   draftStore: t.irreducible('default draftStore', _isEqual({ drafts: {} })),
   sessionID: t.maybe(t.String),
   entryStore: entryStoreValidator,
   threadStore: threadStoreValidator,
   userStore: tShape({
     userInfos: userInfosValidator,
     inconsistencyReports: t.irreducible(
       'default inconsistencyReports',
       _isEqual([]),
     ),
   }),
   messageStore: messageStoreValidator,
   updatesCurrentAsOf: t.Number,
   loadingStatuses: t.irreducible('default loadingStatuses', _isEqual({})),
   calendarFilters: t.irreducible(
     'defaultCalendarFilters',
     _isEqual(defaultCalendarFilters),
   ),
   communityPickerStore: t.irreducible(
     'default communityPickerStore',
     _isEqual({ chat: null, calendar: null }),
   ),
   urlPrefix: tString(''),
   windowDimensions: t.irreducible(
     'default windowDimensions',
     _isEqual({ width: 0, height: 0 }),
   ),
   baseHref: t.String,
   notifPermissionAlertInfo: t.irreducible(
     'default notifPermissionAlertInfo',
     _isEqual(defaultNotifPermissionAlertInfo),
   ),
   connection: tShape({
     status: tString('connecting'),
     queuedActivityUpdates: t.irreducible(
       'default queuedActivityUpdates',
       _isEqual([]),
     ),
     actualizedCalendarQuery: tShape({
       startDate: t.String,
       endDate: t.String,
       filters: t.irreducible(
         'default filters',
         _isEqual(defaultCalendarFilters),
       ),
     }),
     lateResponses: t.irreducible('default lateResponses', _isEqual([])),
     showDisconnectedBar: tBool(false),
   }),
   watchedThreadIDs: t.irreducible('default watchedThreadIDs', _isEqual([])),
   lifecycleState: tString('active'),
   enabledApps: t.irreducible(
     'defaultWebEnabledApps',
     _isEqual(defaultWebEnabledApps),
   ),
   reportStore: t.irreducible(
     'default reportStore',
     _isEqual({
       enabledReports: defaultEnabledReports,
       queuedReports: [],
     }),
   ),
   nextLocalID: tNumber(0),
   cookie: t.Nil,
   deviceToken: t.Nil,
   dataLoaded: t.Boolean,
   windowActive: tBool(true),
   userPolicies: t.irreducible('default userPolicies', _isEqual({})),
   cryptoStore: t.irreducible(
     'default cryptoStore',
     _isEqual({
       primaryIdentityKeys: null,
       notificationIdentityKeys: null,
     }),
   ),
   pushApiPublicKey: t.maybe(t.String),
   _persist: t.Nil,
   commServicesAccessToken: t.Nil,
   inviteLinksStore: inviteLinksStoreValidator,
+  lastCommunicatedPlatformDetails: t.irreducible(
+    'default lastCommunicatedPlatformDetails',
+    _isEqual({}),
+  ),
 });
 
 async function websiteResponder(
   viewer: Viewer,
   req: $Request,
   res: $Response,
 ): Promise<void> {
   const appURLFacts = getAppURLFactsFromRequestURL(req.originalUrl);
   const { basePath, baseDomain } = appURLFacts;
   const baseURL = basePath.replace(/\/$/, '');
   const baseHref = baseDomain + baseURL;
 
   const loadingPromise = getWebpackCompiledRootComponentForSSR();
   const hasNotAcknowledgedPoliciesPromise = hasAnyNotAcknowledgedPolicies(
     viewer.id,
     baseLegalPolicies,
   );
 
   const initialNavInfoPromise = (async () => {
     try {
       const urlInfo = infoFromURL(req.url);
 
       let backupInfo = {
         now: currentDateInTimeZone(viewer.timeZone),
       };
       // Some user ids in selectedUserList might not exist in the userStore
       // (e.g. they were included in the results of the user search endpoint)
       // Because of that we keep their userInfos inside the navInfo.
       if (urlInfo.selectedUserList) {
         const fetchedUserInfos = await fetchUserInfos(urlInfo.selectedUserList);
         const userInfos = {};
         for (const userID in fetchedUserInfos) {
           const userInfo = fetchedUserInfos[userID];
           if (userInfo.username) {
             userInfos[userID] = userInfo;
           }
         }
         backupInfo = { userInfos, ...backupInfo };
       }
       return navInfoFromURL(urlInfo, backupInfo);
     } catch (e) {
       throw new ServerError(e.message);
     }
   })();
 
   const calendarQueryPromise = (async () => {
     const initialNavInfo = await initialNavInfoPromise;
     return {
       startDate: initialNavInfo.startDate,
       endDate: initialNavInfo.endDate,
       filters: defaultCalendarFilters,
     };
   })();
   const messageSelectionCriteria = { joinedThreads: true };
   const initialTime = Date.now();
 
   const assetInfoPromise = getAssetInfo();
   const threadInfoPromise = fetchThreadInfos(viewer);
   const messageInfoPromise = fetchMessageInfos(
     viewer,
     messageSelectionCriteria,
     defaultNumberPerThread,
   );
   const entryInfoPromise = (async () => {
     const calendarQuery = await calendarQueryPromise;
     return await fetchEntryInfos(viewer, [calendarQuery]);
   })();
   const currentUserInfoPromise = fetchCurrentUserInfo(viewer);
   const userInfoPromise = fetchKnownUserInfos(viewer);
 
   const sessionIDPromise = (async () => {
     const calendarQuery = await calendarQueryPromise;
     if (viewer.loggedIn) {
       await setNewSession(viewer, calendarQuery, initialTime);
     }
     return viewer.sessionID;
   })();
 
   const threadStorePromise = (async () => {
     const [{ threadInfos }, hasNotAcknowledgedPolicies] = await Promise.all([
       threadInfoPromise,
       hasNotAcknowledgedPoliciesPromise,
     ]);
     return { threadInfos: hasNotAcknowledgedPolicies ? {} : threadInfos };
   })();
   const messageStorePromise = (async () => {
     const [
       { threadInfos },
       { rawMessageInfos, truncationStatuses },
       hasNotAcknowledgedPolicies,
     ] = await Promise.all([
       threadInfoPromise,
       messageInfoPromise,
       hasNotAcknowledgedPoliciesPromise,
     ]);
     if (hasNotAcknowledgedPolicies) {
       return {
         messages: {},
         threads: {},
         local: {},
         currentAsOf: 0,
       };
     }
     const { messageStore: freshStore } = freshMessageStore(
       rawMessageInfos,
       truncationStatuses,
       mostRecentMessageTimestamp(rawMessageInfos, initialTime),
       threadInfos,
     );
     return freshStore;
   })();
   const entryStorePromise = (async () => {
     const [{ rawEntryInfos }, hasNotAcknowledgedPolicies] = await Promise.all([
       entryInfoPromise,
       hasNotAcknowledgedPoliciesPromise,
     ]);
     if (hasNotAcknowledgedPolicies) {
       return {
         entryInfos: {},
         daysToEntries: {},
         lastUserInteractionCalendar: 0,
       };
     }
     return {
       entryInfos: _keyBy('id')(rawEntryInfos),
       daysToEntries: daysToEntriesFromEntryInfos(rawEntryInfos),
       lastUserInteractionCalendar: initialTime,
     };
   })();
   const userStorePromise = (async () => {
     const [userInfos, hasNotAcknowledgedPolicies] = await Promise.all([
       userInfoPromise,
       hasNotAcknowledgedPoliciesPromise,
     ]);
     return {
       userInfos: hasNotAcknowledgedPolicies ? {} : userInfos,
       inconsistencyReports: [],
     };
   })();
 
   const navInfoPromise = (async () => {
     const [
       { threadInfos },
       messageStore,
       currentUserInfo,
       userStore,
       finalNavInfo,
     ] = await Promise.all([
       threadInfoPromise,
       messageStorePromise,
       currentUserInfoPromise,
       userStorePromise,
       initialNavInfoPromise,
     ]);
 
     const requestedActiveChatThreadID = finalNavInfo.activeChatThreadID;
     if (
       requestedActiveChatThreadID &&
       !threadIsPending(requestedActiveChatThreadID) &&
       !threadHasPermission(
         threadInfos[requestedActiveChatThreadID],
         threadPermissions.VISIBLE,
       )
     ) {
       finalNavInfo.activeChatThreadID = null;
     }
 
     if (!finalNavInfo.activeChatThreadID) {
       const mostRecentThread = mostRecentlyReadThread(
         messageStore,
         threadInfos,
       );
       if (mostRecentThread) {
         finalNavInfo.activeChatThreadID = mostRecentThread;
       }
     }
 
     if (
       finalNavInfo.activeChatThreadID &&
       threadIsPending(finalNavInfo.activeChatThreadID) &&
       finalNavInfo.pendingThread?.id !== finalNavInfo.activeChatThreadID
     ) {
       const pendingThreadData = parsePendingThreadID(
         finalNavInfo.activeChatThreadID,
       );
       if (
         pendingThreadData &&
         pendingThreadData.threadType !== threadTypes.SIDEBAR &&
         currentUserInfo.id
       ) {
         const { userInfos } = userStore;
         const members = [...pendingThreadData.memberIDs, currentUserInfo.id]
           .map(id => {
             const userInfo = userInfos[id];
             if (!userInfo || !userInfo.username) {
               return undefined;
             }
             const { username } = userInfo;
             return { id, username };
           })
           .filter(Boolean);
         const newPendingThread = createPendingThread({
           viewerID: currentUserInfo.id,
           threadType: pendingThreadData.threadType,
           members,
         });
         finalNavInfo.activeChatThreadID = newPendingThread.id;
         finalNavInfo.pendingThread = newPendingThread;
       }
     }
 
     return finalNavInfo;
   })();
   const currentAsOfPromise = (async () => {
     const hasNotAcknowledgedPolicies = await hasNotAcknowledgedPoliciesPromise;
     return hasNotAcknowledgedPolicies ? 0 : initialTime;
   })();
 
   const pushApiPublicKeyPromise = (async () => {
     const pushConfig = await getWebPushConfig();
     if (!pushConfig) {
       if (process.env.NODE_ENV !== 'development') {
         console.warn('keyserver/secrets/web_push_config.json should exist');
       }
       return null;
     }
     return pushConfig.publicKey;
   })();
 
   const inviteLinksStorePromise = (async () => {
     const primaryInviteLinks = await fetchPrimaryInviteLinks(viewer);
     const links = {};
     for (const link of primaryInviteLinks) {
       if (link.primary) {
         links[link.communityID] = {
           primaryLink: link,
         };
       }
     }
     return {
       links,
     };
   })();
 
   const { jsURL, fontsURL, cssInclude, olmFilename, sqljsFilename, opaqueURL } =
     await assetInfoPromise;
 
   // prettier-ignore
   res.write(html`
     <!DOCTYPE html>
     <html lang="en">
       <head>
         <meta charset="utf-8" />
         <title>${getTitle(0)}</title>
         <base href="${basePath}" />
         <link rel="stylesheet" type="text/css" href="${fontsURL}" />
         ${cssInclude}
         <link
           rel="apple-touch-icon"
           sizes="180x180"
           href="apple-touch-icon.png"
         />
         <link
           rel="icon"
           type="image/png"
           sizes="32x32"
           href="favicon-32x32.png"
         />
         <link
           rel="icon"
           type="image/png"
           sizes="16x16"
           href="favicon-16x16.png"
         />
         <link rel="manifest" href="site.webmanifest" />
         <meta name="apple-mobile-web-app-title" content="Comm" />
         <meta name="application-name" content="Comm" />
         <meta name="msapplication-TileColor" content="#b91d47" />
         <meta name="theme-color" content="#b91d47" />
       </head>
       <body>
         <div id="react-root">
   `);
 
   const Loading = await loadingPromise;
   const reactStream = renderToNodeStream(<Loading />);
   reactStream.pipe(res, { end: false });
 
   await waitForStream(reactStream);
   res.write(html`
     </div>
     <script>
       var preloadedState =
   `);
 
   const initialReduxState = await promiseAll({
     navInfo: navInfoPromise,
     deviceID: null,
     currentUserInfo: currentUserInfoPromise,
     draftStore: { drafts: {} },
     sessionID: sessionIDPromise,
     entryStore: entryStorePromise,
     threadStore: threadStorePromise,
     userStore: userStorePromise,
     messageStore: messageStorePromise,
     updatesCurrentAsOf: currentAsOfPromise,
     loadingStatuses: {},
     calendarFilters: defaultCalendarFilters,
     communityPickerStore: { chat: null, calendar: null },
     // We can use paths local to the <base href> on web
     urlPrefix: '',
     windowDimensions: { width: 0, height: 0 },
     baseHref,
     notifPermissionAlertInfo: defaultNotifPermissionAlertInfo,
     connection: (async () => ({
       ...defaultConnectionInfo(viewer.platform ?? 'web', viewer.timeZone),
       actualizedCalendarQuery: await calendarQueryPromise,
     }))(),
     watchedThreadIDs: [],
     lifecycleState: 'active',
     enabledApps: defaultWebEnabledApps,
     reportStore: {
       enabledReports: defaultEnabledReports,
       queuedReports: [],
     },
     nextLocalID: 0,
     cookie: undefined,
     deviceToken: null,
     dataLoaded: viewer.loggedIn,
     windowActive: true,
     userPolicies: {},
     cryptoStore: {
       primaryIdentityKeys: null,
       notificationIdentityKeys: null,
     },
     pushApiPublicKey: pushApiPublicKeyPromise,
     _persist: null,
     commServicesAccessToken: null,
     inviteLinksStore: inviteLinksStorePromise,
+    lastCommunicatedPlatformDetails: {},
   });
   const validatedInitialReduxState = validateOutput(
     viewer.platformDetails,
     initialReduxStateValidator,
     initialReduxState,
   );
   const jsonStream = streamJSON(res, validatedInitialReduxState);
 
   await waitForStream(jsonStream);
   res.end(html`
     ;
           var baseURL = "${baseURL}";
           var olmFilename = "${olmFilename}";
           var sqljsFilename = "${sqljsFilename}";
           var opaqueURL = "${opaqueURL}";
         </script>
         <script src="${jsURL}"></script>
       </body>
     </html>
   `);
 }
 
 const inviteSecretRegex = /^[a-z0-9]+$/i;
 
 // On native, if this responder is called, it means that the app isn't
 // installed.
 async function inviteResponder(req: $Request, res: $Response): Promise<void> {
   const { secret } = req.params;
   const userAgent = req.get('User-Agent');
   const detectionResult = detectBrowser(userAgent);
   if (detectionResult.os === 'Android OS') {
     const isSecretValid = inviteSecretRegex.test(secret);
     const referrer = isSecretValid
       ? `&referrer=${encodeURIComponent(`utm_source=invite/${secret}`)}`
       : '';
     const redirectUrl = `${stores.googlePlayUrl}${referrer}`;
     res.writeHead(301, {
       Location: redirectUrl,
     });
     res.end();
     return;
   } else if (detectionResult.os !== 'iOS') {
     const urlFacts = getCommAppURLFacts();
     const baseDomain = urlFacts?.baseDomain ?? '';
     const basePath = urlFacts?.basePath ?? '/';
     const redirectUrl = `${baseDomain}${basePath}handle/invite/${secret}`;
     res.writeHead(301, {
       Location: redirectUrl,
     });
     res.end();
     return;
   }
   const fontsURL = await getFontsURL();
   res.end(html`
     <!DOCTYPE html>
     <html lang="en">
       <head>
         <meta charset="utf-8" />
         <title>Comm</title>
         <link rel="stylesheet" type="text/css" href="/${fontsURL}" />
         <style>
           * {
             -webkit-font-smoothing: antialiased;
             -moz-osx-font-smoothing: grayscale;
             box-sizing: border-box;
             padding: 0;
             margin: 0;
           }
 
           html {
             height: 100%;
             font-size: 112.5%;
           }
 
           body {
             font-family: 'Inter', -apple-system, 'Segoe UI', 'Roboto', 'Oxygen',
               'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
               ui-sans-serif;
             background: #0a0a0a url('/images/invite_link_background.png')
               no-repeat;
             background-size: cover;
             color: #ffffff;
             display: flex;
             flex-direction: column;
             justify-content: space-around;
             align-items: center;
             height: 100%;
             padding: 1.6rem;
             font-size: 1.8rem;
             line-height: 2.4rem;
             font-weight: 500;
           }
 
           section {
             display: flex;
             flex-direction: column;
             align-items: center;
             justify-content: space-between;
             width: 100%;
           }
 
           .card {
             width: 100%;
             padding: 3.2rem 1.6rem;
             gap: 4rem;
             background-color: #1f1f1f;
             border-radius: 1.6rem;
           }
 
           .buttons {
             gap: 1.2rem;
           }
 
           h1 {
             font-size: 3.6rem;
             line-height: 1.5;
             font-weight: 500;
             font-family: 'IBM Plex Sans', sans-serif;
           }
 
           p {
             text-align: center;
           }
 
           .separator {
             border: 1px solid #404040;
             width: 100%;
           }
 
           .button {
             all: unset;
             box-sizing: border-box;
             display: flex;
             justify-content: center;
             align-items: center;
             width: 100%;
             padding: 1.7rem;
             border-radius: 0.4rem;
             border: 1px solid transparent;
             background-color: #6d49ab;
             font-size: 1.6rem;
             line-height: 1.5;
           }
 
           .button.secondary {
             background-color: #1f1f1f;
             border-color: #ffffff;
           }
 
           .link {
             all: unset;
             box-sizing: border-box;
             display: flex;
             align-items: center;
           }
 
           .link-text {
             text-decoration-line: underline;
           }
 
           .logo-container {
             background-color: #0a0a0a;
             width: 4.2rem;
             height: 4.2rem;
             display: flex;
             justify-content: center;
             align-items: center;
             border-radius: 50%;
           }
 
           .logo {
             height: 2.6rem;
           }
 
           .arrow {
             width: 1.8rem;
             height: 1.8rem;
           }
         </style>
       </head>
       <body>
         <div></div>
         <section class="card">
           <section>
             <div class="logo-container">
               <img
                 src="/images/loading_logo.svg"
                 alt="Comm logo"
                 class="logo"
               />
             </div>
             <h1>Comm</h1>
           </section>
           <p>
             To join this community, download the Comm app and reopen this invite
             link
           </p>
           <div class="separator"></div>
           <section class="buttons">
             <a class="button" href="${stores.appStoreUrl}">Download Comm</a>
             <a
               class="button secondary"
               href="https://comm.app/invite/${secret}"
             >
               Invite Link
             </a>
           </section>
         </section>
         <a class="link" href="https://comm.app/">
           <span class="link-text">Visit Comm’s website</span>
           <img
             src="/images/arrow_up_right.svg"
             alt="arrow up right"
             class="arrow"
           />
         </a>
       </body>
     </html>
   `);
 }
 
 export { websiteResponder, inviteResponder };
diff --git a/lib/actions/device-actions.js b/lib/actions/device-actions.js
index 48ed5c0fd..480639088 100644
--- a/lib/actions/device-actions.js
+++ b/lib/actions/device-actions.js
@@ -1,43 +1,47 @@
 // @flow
 
 import type { VersionResponse } from '../types/device-types.js';
 import type { CallServerEndpoint } from '../utils/call-server-endpoint.js';
 import { getConfig } from '../utils/config.js';
 
 const setDeviceTokenActionTypes = Object.freeze({
   started: 'SET_DEVICE_TOKEN_STARTED',
   success: 'SET_DEVICE_TOKEN_SUCCESS',
   failed: 'SET_DEVICE_TOKEN_FAILED',
 });
 const setDeviceToken =
   (
     callServerEndpoint: CallServerEndpoint,
   ): ((deviceToken: ?string) => Promise<?string>) =>
   async deviceToken => {
     await callServerEndpoint('update_device_token', {
       deviceToken,
       platformDetails: getConfig().platformDetails,
     });
     return deviceToken;
   };
 
 const getVersionActionTypes = Object.freeze({
   started: 'GET_VERSION_STARTED',
   success: 'GET_VERSION_SUCCESS',
   failed: 'GET_VERSION_FAILED',
 });
 const getVersion =
   (callServerEndpoint: CallServerEndpoint): (() => Promise<VersionResponse>) =>
   async () => {
     const response = await callServerEndpoint('version');
     return {
       codeVersion: response.codeVersion,
     };
   };
 
+const updateLastCommunicatedPlatformDetailsActionType =
+  'UPDATE_LAST_COMMUNICATED_PLATFORM_DETAILS';
+
 export {
   setDeviceTokenActionTypes,
   setDeviceToken,
   getVersionActionTypes,
   getVersion,
+  updateLastCommunicatedPlatformDetailsActionType,
 };
diff --git a/lib/hooks/toggle-unread-status.js b/lib/hooks/toggle-unread-status.js
index 1b17135c1..3194412b4 100644
--- a/lib/hooks/toggle-unread-status.js
+++ b/lib/hooks/toggle-unread-status.js
@@ -1,59 +1,59 @@
 // @flow
 
 import * as React from 'react';
 
 import {
   setThreadUnreadStatus,
   setThreadUnreadStatusActionTypes,
 } from '../actions/activity-actions.js';
 import type {
   SetThreadUnreadStatusPayload,
   SetThreadUnreadStatusRequest,
 } from '../types/activity-types.js';
 import type { ThreadInfo } from '../types/thread-types.js';
 import {
   useDispatchActionPromise,
   useServerCall,
 } from '../utils/action-utils.js';
 
 function useToggleUnreadStatus(
   threadInfo: ThreadInfo,
   mostRecentNonLocalMessage: ?string,
   afterAction: () => void,
 ): () => void {
   const dispatchActionPromise = useDispatchActionPromise();
   const { currentUser } = threadInfo;
   const boundSetThreadUnreadStatus: (
     request: SetThreadUnreadStatusRequest,
   ) => Promise<SetThreadUnreadStatusPayload> = useServerCall(
     setThreadUnreadStatus,
   );
   const toggleUnreadStatus = React.useCallback(() => {
     const request = {
       threadID: threadInfo.id,
       unread: !currentUser.unread,
       latestMessage: mostRecentNonLocalMessage,
     };
     dispatchActionPromise(
       setThreadUnreadStatusActionTypes,
       boundSetThreadUnreadStatus(request),
       undefined,
-      {
+      ({
         threadID: threadInfo.id,
         unread: !currentUser.unread,
-      },
+      }: { +threadID: string, +unread: boolean }),
     );
     afterAction();
   }, [
     threadInfo.id,
     currentUser.unread,
     mostRecentNonLocalMessage,
     dispatchActionPromise,
     afterAction,
     boundSetThreadUnreadStatus,
   ]);
 
   return toggleUnreadStatus;
 }
 
 export default useToggleUnreadStatus;
diff --git a/lib/reducers/last-communicated-platform-details-reducer.js b/lib/reducers/last-communicated-platform-details-reducer.js
new file mode 100644
index 000000000..d8fc3d9a3
--- /dev/null
+++ b/lib/reducers/last-communicated-platform-details-reducer.js
@@ -0,0 +1,35 @@
+// @flow
+
+import { updateLastCommunicatedPlatformDetailsActionType } from '../actions/device-actions.js';
+import { siweAuthActionTypes } from '../actions/siwe-actions.js';
+import {
+  logInActionTypes,
+  registerActionTypes,
+} from '../actions/user-actions.js';
+import type { LastCommunicatedPlatformDetails } from '../types/device-types';
+import type { BaseAction } from '../types/redux-types';
+import { getConfig } from '../utils/config.js';
+
+export default function reduceLastCommunicatedPlatformDetails(
+  state: LastCommunicatedPlatformDetails,
+  action: BaseAction,
+  currentURLPrefix: string,
+): LastCommunicatedPlatformDetails {
+  if (
+    action.type === logInActionTypes.success ||
+    action.type === siweAuthActionTypes.success ||
+    action.type === registerActionTypes.success
+  ) {
+    return {
+      ...state,
+      [currentURLPrefix]: getConfig().platformDetails,
+    };
+  }
+  if (action.type === updateLastCommunicatedPlatformDetailsActionType) {
+    return {
+      ...state,
+      ...action.payload,
+    };
+  }
+  return state;
+}
diff --git a/lib/reducers/master-reducer.js b/lib/reducers/master-reducer.js
index a857ee524..12d5453b2 100644
--- a/lib/reducers/master-reducer.js
+++ b/lib/reducers/master-reducer.js
@@ -1,138 +1,144 @@
 // @flow
 
 import reduceCalendarFilters from './calendar-filters-reducer.js';
 import reduceConnectionInfo from './connection-reducer.js';
 import reduceDataLoaded from './data-loaded-reducer.js';
 import { reduceDeviceToken } from './device-token-reducer.js';
 import { reduceDraftStore } from './draft-reducer.js';
 import reduceEnabledApps from './enabled-apps-reducer.js';
 import { reduceEntryInfos } from './entry-reducer.js';
 import reduceInviteLinks from './invite-links-reducer.js';
+import reduceLastCommunicatedPlatformDetails from './last-communicated-platform-details-reducer.js';
 import reduceLifecycleState from './lifecycle-state-reducer.js';
 import { reduceLoadingStatuses } from './loading-reducer.js';
 import reduceNextLocalID from './local-id-reducer.js';
 import { reduceMessageStore } from './message-reducer.js';
 import reduceBaseNavInfo from './nav-reducer.js';
 import { reduceNotifPermissionAlertInfo } from './notif-permission-alert-info-reducer.js';
 import policiesReducer from './policies-reducer.js';
 import reduceReportStore from './report-store-reducer.js';
 import reduceServicesAccessToken from './services-access-token-reducer.js';
 import { reduceThreadInfos } from './thread-reducer.js';
 import reduceUpdatesCurrentAsOf from './updates-reducer.js';
 import reduceURLPrefix from './url-prefix-reducer.js';
 import { reduceCurrentUserInfo, reduceUserInfos } from './user-reducer.js';
 import { siweAuthActionTypes } from '../actions/siwe-actions.js';
 import {
   registerActionTypes,
   logInActionTypes,
 } from '../actions/user-actions.js';
 import type { BaseNavInfo } from '../types/nav-types.js';
 import type { BaseAppState, BaseAction } from '../types/redux-types.js';
 import {
   fullStateSyncActionType,
   incrementalStateSyncActionType,
 } from '../types/socket-types.js';
 import type { StoreOperations } from '../types/store-ops-types.js';
 
 export default function baseReducer<N: BaseNavInfo, T: BaseAppState<N>>(
   state: T,
   action: BaseAction,
 ): { state: T, storeOperations: StoreOperations } {
   const { threadStore, newThreadInconsistencies, threadStoreOperations } =
     reduceThreadInfos(state.threadStore, action);
   const { threadInfos } = threadStore;
 
   const [entryStore, newEntryInconsistencies] = reduceEntryInfos(
     state.entryStore,
     action,
     threadInfos,
   );
 
   const newInconsistencies = [
     ...newEntryInconsistencies,
     ...newThreadInconsistencies,
   ];
   // Only allow checkpoints to increase if we are connected
   // or if the action is a STATE_SYNC
   const { messageStoreOperations, messageStore: reducedMessageStore } =
     reduceMessageStore(state.messageStore, action, threadInfos);
   let messageStore = reducedMessageStore;
   let updatesCurrentAsOf = reduceUpdatesCurrentAsOf(
     state.updatesCurrentAsOf,
     action,
   );
   const connection = reduceConnectionInfo(state.connection, action);
   if (
     connection.status !== 'connected' &&
     action.type !== incrementalStateSyncActionType &&
     action.type !== fullStateSyncActionType &&
     action.type !== registerActionTypes.success &&
     action.type !== logInActionTypes.success &&
     action.type !== siweAuthActionTypes.success
   ) {
     if (messageStore.currentAsOf !== state.messageStore.currentAsOf) {
       messageStore = {
         ...messageStore,
         currentAsOf: state.messageStore.currentAsOf,
       };
     }
     if (updatesCurrentAsOf !== state.updatesCurrentAsOf) {
       updatesCurrentAsOf = state.updatesCurrentAsOf;
     }
   }
 
   const { draftStore, draftStoreOperations } = reduceDraftStore(
     state.draftStore,
     action,
   );
 
   const { reportStore, reportStoreOperations } = reduceReportStore(
     state.reportStore,
     action,
     newInconsistencies,
   );
 
   return {
     state: {
       ...state,
       navInfo: reduceBaseNavInfo(state.navInfo, action),
       draftStore,
       entryStore,
       loadingStatuses: reduceLoadingStatuses(state.loadingStatuses, action),
       currentUserInfo: reduceCurrentUserInfo(state.currentUserInfo, action),
       threadStore,
       userStore: reduceUserInfos(state.userStore, action),
       messageStore,
       updatesCurrentAsOf,
       urlPrefix: reduceURLPrefix(state.urlPrefix, action),
       calendarFilters: reduceCalendarFilters(
         state.calendarFilters,
         action,
         threadStore,
       ),
       notifPermissionAlertInfo: reduceNotifPermissionAlertInfo(
         state.notifPermissionAlertInfo,
         action,
       ),
       connection,
       lifecycleState: reduceLifecycleState(state.lifecycleState, action),
       enabledApps: reduceEnabledApps(state.enabledApps, action),
       reportStore,
       nextLocalID: reduceNextLocalID(state.nextLocalID, action),
       dataLoaded: reduceDataLoaded(state.dataLoaded, action),
       userPolicies: policiesReducer(state.userPolicies, action),
       deviceToken: reduceDeviceToken(state.deviceToken, action),
       commServicesAccessToken: reduceServicesAccessToken(
         state.commServicesAccessToken,
         action,
       ),
       inviteLinksStore: reduceInviteLinks(state.inviteLinksStore, action),
+      lastCommunicatedPlatformDetails: reduceLastCommunicatedPlatformDetails(
+        state.lastCommunicatedPlatformDetails,
+        action,
+        state.urlPrefix,
+      ),
     },
     storeOperations: {
       draftStoreOperations,
       threadStoreOperations,
       messageStoreOperations,
       reportStoreOperations,
     },
   };
 }
diff --git a/lib/shared/edit-messages-utils.js b/lib/shared/edit-messages-utils.js
index b02aaa857..1b88530fd 100644
--- a/lib/shared/edit-messages-utils.js
+++ b/lib/shared/edit-messages-utils.js
@@ -1,89 +1,91 @@
 // @flow
 
 import * as React from 'react';
 
 import { threadIsPending, threadHasPermission } from './thread-utils.js';
 import {
   sendEditMessageActionTypes,
   sendEditMessage,
 } from '../actions/message-actions.js';
 import type {
   SendEditMessageResult,
   RobotextMessageInfo,
   ComposableMessageInfo,
+  RawMessageInfo,
 } from '../types/message-types';
 import { messageTypes } from '../types/message-types-enum.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
 import { type ThreadInfo } from '../types/thread-types.js';
 import {
   useDispatchActionPromise,
   useServerCall,
 } from '../utils/action-utils.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 function useEditMessage(): (
   messageID: string,
   newText: string,
 ) => Promise<SendEditMessageResult> {
   const callEditMessage = useServerCall(sendEditMessage);
   const dispatchActionPromise = useDispatchActionPromise();
 
   return React.useCallback(
     (messageID, newText) => {
       const editMessagePromise = (async () => {
         const result = await callEditMessage({
           targetMessageID: messageID,
           text: newText,
         });
-        return {
+
+        return ({
           newMessageInfos: result.newMessageInfos,
-        };
+        }: { +newMessageInfos: $ReadOnlyArray<RawMessageInfo> });
       })();
 
       dispatchActionPromise(sendEditMessageActionTypes, editMessagePromise);
 
       return editMessagePromise;
     },
     [dispatchActionPromise, callEditMessage],
   );
 }
 
 function useCanEditMessage(
   threadInfo: ThreadInfo,
   targetMessageInfo: ComposableMessageInfo | RobotextMessageInfo,
 ): boolean {
   const currentUserInfo = useSelector(state => state.currentUserInfo);
 
   if (targetMessageInfo.type !== messageTypes.TEXT) {
     return false;
   }
 
   if (!currentUserInfo || !currentUserInfo.id) {
     return false;
   }
 
   const currentUserId = currentUserInfo.id;
   const targetMessageCreatorId = targetMessageInfo.creator.id;
   if (currentUserId !== targetMessageCreatorId) {
     return false;
   }
 
   const hasPermission = threadHasPermission(
     threadInfo,
     threadPermissions.EDIT_MESSAGE,
   );
   return hasPermission;
 }
 
 function getMessageLabel(
   hasBeenEdited: ?boolean,
   threadInfo: ThreadInfo,
 ): ?string {
   const isPending = threadIsPending(threadInfo.id);
   if (hasBeenEdited && !isPending) {
     return 'Edited';
   }
   return null;
 }
 
 export { useCanEditMessage, useEditMessage, getMessageLabel };
diff --git a/lib/types/device-types.js b/lib/types/device-types.js
index 771e9185f..e681a04d7 100644
--- a/lib/types/device-types.js
+++ b/lib/types/device-types.js
@@ -1,46 +1,50 @@
 // @flow
 
 import invariant from 'invariant';
 
 import { values } from '../utils/objects.js';
 
 const deviceTypesObj = Object.freeze({
   ios: 'ios',
   android: 'android',
 });
 export type DeviceType = $Values<typeof deviceTypesObj>;
 export type Platform = DeviceType | 'web' | 'windows' | 'macos';
 
 export const deviceTypes: $ReadOnlyArray<DeviceType> = values(deviceTypesObj);
 
 export function isDeviceType(platform: ?string): boolean {
   return platform === 'ios' || platform === 'android';
 }
 
 export function assertDeviceType(deviceType: ?string): DeviceType {
   invariant(
     deviceType === 'ios' || deviceType === 'android',
     'string is not DeviceType enum',
   );
   return deviceType;
 }
 
 export function isWebPlatform(platform: ?string): boolean {
   return platform === 'web' || platform === 'windows' || platform === 'macos';
 }
 
 export type DeviceTokenUpdateRequest = {
   +deviceToken: string,
   +deviceType?: DeviceType,
   +platformDetails?: PlatformDetails,
 };
 
 export type PlatformDetails = {
   +platform: Platform,
   +codeVersion?: number,
   +stateVersion?: number,
 };
 
 export type VersionResponse = {
   +codeVersion: number,
 };
+
+export type LastCommunicatedPlatformDetails = {
+  +[urlPrefix: string]: PlatformDetails,
+};
diff --git a/lib/types/redux-types.js b/lib/types/redux-types.js
index 382819aea..cf7709d5e 100644
--- a/lib/types/redux-types.js
+++ b/lib/types/redux-types.js
@@ -1,1180 +1,1188 @@
 // @flow
 
 import type {
   LogOutResult,
   LogInStartingPayload,
   LogInResult,
   RegisterResult,
   DefaultNotificationPayload,
 } from './account-types.js';
 import type {
   ActivityUpdateSuccessPayload,
   QueueActivityUpdatesPayload,
   SetThreadUnreadStatusPayload,
 } from './activity-types.js';
 import type {
   UpdateUserAvatarRequest,
   UpdateUserAvatarResponse,
 } from './avatar-types.js';
 import type { CryptoStore } from './crypto-types.js';
-import type { VersionResponse } from './device-types.js';
+import type {
+  VersionResponse,
+  LastCommunicatedPlatformDetails,
+} from './device-types.js';
 import type { ClientDBDraftInfo, DraftStore } from './draft-types.js';
 import type { EnabledApps, SupportedApps } from './enabled-apps.js';
 import type {
   RawEntryInfo,
   EntryStore,
   SaveEntryPayload,
   CreateEntryPayload,
   DeleteEntryResult,
   RestoreEntryPayload,
   FetchEntryInfosResult,
   CalendarQueryUpdateResult,
   CalendarQueryUpdateStartingPayload,
 } from './entry-types.js';
 import type {
   CalendarFilter,
   CalendarThreadFilter,
   SetCalendarDeletedFilterPayload,
 } from './filter-types.js';
 import type { LifecycleState } from './lifecycle-state-types.js';
 import type {
   FetchInviteLinksResponse,
   InviteLink,
   InviteLinksStore,
   InviteLinkVerificationResponse,
   DisableInviteLinkPayload,
 } from './link-types.js';
 import type { LoadingStatus, LoadingInfo } from './loading-types.js';
 import type { UpdateMultimediaMessageMediaPayload } from './media-types.js';
 import type { MessageReportCreationResult } from './message-report-types.js';
 import type {
   MessageStore,
   RawMultimediaMessageInfo,
   FetchMessageInfosPayload,
   SendMessagePayload,
   EditMessagePayload,
   SaveMessagesPayload,
   NewMessagesPayload,
   MessageStorePrunePayload,
   LocallyComposedMessageInfo,
   ClientDBMessageInfo,
   SimpleMessagesPayload,
   ClientDBThreadMessageInfo,
   FetchPinnedMessagesResult,
   SearchMessagesResponse,
 } from './message-types.js';
 import type { RawReactionMessageInfo } from './messages/reaction.js';
 import type { RawTextMessageInfo } from './messages/text.js';
 import type { BaseNavInfo } from './nav-types.js';
 import {
   type ForcePolicyAcknowledgmentPayload,
   type PolicyAcknowledgmentPayload,
   type UserPolicies,
 } from './policy-types.js';
 import type { RelationshipErrors } from './relationship-types.js';
 import type {
   EnabledReports,
   ClearDeliveredReportsPayload,
   QueueReportsPayload,
   ReportStore,
   ClientReportCreationRequest,
 } from './report-types.js';
 import type {
   ProcessServerRequestsPayload,
   GetOlmSessionInitializationDataResponse,
 } from './request-types.js';
 import type {
   UserSearchResult,
   ExactUserSearchResult,
 } from './search-types.js';
 import type { SetSessionPayload } from './session-types.js';
 import type {
   ConnectionInfo,
   StateSyncFullActionPayload,
   StateSyncIncrementalActionPayload,
   UpdateConnectionStatusPayload,
   SetLateResponsePayload,
   UpdateDisconnectedBarPayload,
 } from './socket-types.js';
 import type { SubscriptionUpdateResult } from './subscription-types.js';
 import type {
   ThreadStore,
   ChangeThreadSettingsPayload,
   LeaveThreadPayload,
   NewThreadResult,
   ThreadJoinPayload,
   ToggleMessagePinResult,
 } from './thread-types.js';
 import type { ClientUpdatesResultWithUserInfos } from './update-types.js';
 import type { CurrentUserInfo, UserStore } from './user-types.js';
 import type { Shape } from '../types/core.js';
 import type { NotifPermissionAlertInfo } from '../utils/push-alerts.js';
 
 export type BaseAppState<NavInfo: BaseNavInfo> = {
   navInfo: NavInfo,
   currentUserInfo: ?CurrentUserInfo,
   draftStore: DraftStore,
   entryStore: EntryStore,
   threadStore: ThreadStore,
   userStore: UserStore,
   messageStore: MessageStore,
   updatesCurrentAsOf: number, // millisecond timestamp
   loadingStatuses: { [key: string]: { [idx: number]: LoadingStatus } },
   calendarFilters: $ReadOnlyArray<CalendarFilter>,
   urlPrefix: string,
   notifPermissionAlertInfo: NotifPermissionAlertInfo,
   connection: ConnectionInfo,
   watchedThreadIDs: $ReadOnlyArray<string>,
   lifecycleState: LifecycleState,
   enabledApps: EnabledApps,
   reportStore: ReportStore,
   nextLocalID: number,
   dataLoaded: boolean,
   userPolicies: UserPolicies,
   deviceToken: ?string,
   +commServicesAccessToken: ?string,
   +inviteLinksStore: InviteLinksStore,
+  +lastCommunicatedPlatformDetails: LastCommunicatedPlatformDetails,
   ...
 };
 
 // Web JS runtime doesn't have access to the cookie for security reasons.
 // Native JS doesn't have a sessionID because the cookieID is used instead.
 export type NativeAppState = BaseAppState<*> & {
   sessionID?: void,
   cookie: ?string,
   ...
 };
 export type WebAppState = BaseAppState<*> & {
   sessionID: ?string,
   cookie?: void,
   cryptoStore: CryptoStore,
   pushApiPublicKey: ?string,
   ...
 };
 export type AppState = NativeAppState | WebAppState;
 
 export type BaseAction =
   | {
       +type: '@@redux/INIT',
       +payload?: void,
     }
   | {
       +type: 'FETCH_ENTRIES_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_ENTRIES_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_ENTRIES_SUCCESS',
       +payload: FetchEntryInfosResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'LOG_OUT_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'LOG_OUT_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'LOG_OUT_SUCCESS',
       +payload: LogOutResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'DELETE_ACCOUNT_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'DELETE_ACCOUNT_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'DELETE_ACCOUNT_SUCCESS',
       +payload: LogOutResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CREATE_LOCAL_ENTRY',
       +payload: RawEntryInfo,
     }
   | {
       +type: 'CREATE_ENTRY_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CREATE_ENTRY_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CREATE_ENTRY_SUCCESS',
       +payload: CreateEntryPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SAVE_ENTRY_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SAVE_ENTRY_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SAVE_ENTRY_SUCCESS',
       +payload: SaveEntryPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CONCURRENT_MODIFICATION_RESET',
       +payload: {
         +id: string,
         +dbText: string,
       },
     }
   | {
       +type: 'DELETE_ENTRY_STARTED',
       +loadingInfo: LoadingInfo,
       +payload: {
         +localID: ?string,
         +serverID: ?string,
       },
     }
   | {
       +type: 'DELETE_ENTRY_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'DELETE_ENTRY_SUCCESS',
       +payload: ?DeleteEntryResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'LOG_IN_STARTED',
       +loadingInfo: LoadingInfo,
       +payload: LogInStartingPayload,
     }
   | {
       +type: 'LOG_IN_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'LOG_IN_SUCCESS',
       +payload: LogInResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'REGISTER_STARTED',
       +loadingInfo: LoadingInfo,
       +payload: LogInStartingPayload,
     }
   | {
       +type: 'REGISTER_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'REGISTER_SUCCESS',
       +payload: RegisterResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CHANGE_USER_PASSWORD_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CHANGE_USER_PASSWORD_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CHANGE_USER_PASSWORD_SUCCESS',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CHANGE_THREAD_SETTINGS_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CHANGE_THREAD_SETTINGS_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CHANGE_THREAD_SETTINGS_SUCCESS',
       +payload: ChangeThreadSettingsPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'DELETE_THREAD_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'DELETE_THREAD_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'DELETE_THREAD_SUCCESS',
       +payload: LeaveThreadPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'NEW_THREAD_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'NEW_THREAD_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'NEW_THREAD_SUCCESS',
       +payload: NewThreadResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'REMOVE_USERS_FROM_THREAD_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'REMOVE_USERS_FROM_THREAD_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'REMOVE_USERS_FROM_THREAD_SUCCESS',
       +payload: ChangeThreadSettingsPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CHANGE_THREAD_MEMBER_ROLES_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CHANGE_THREAD_MEMBER_ROLES_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CHANGE_THREAD_MEMBER_ROLES_SUCCESS',
       +payload: ChangeThreadSettingsPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_REVISIONS_FOR_ENTRY_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_REVISIONS_FOR_ENTRY_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_REVISIONS_FOR_ENTRY_SUCCESS',
       +payload: {
         +entryID: string,
         +text: string,
         +deleted: boolean,
       },
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'RESTORE_ENTRY_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'RESTORE_ENTRY_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'RESTORE_ENTRY_SUCCESS',
       +payload: RestoreEntryPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'JOIN_THREAD_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'JOIN_THREAD_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'JOIN_THREAD_SUCCESS',
       +payload: ThreadJoinPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'LEAVE_THREAD_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'LEAVE_THREAD_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'LEAVE_THREAD_SUCCESS',
       +payload: LeaveThreadPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SET_NEW_SESSION',
       +payload: SetSessionPayload,
     }
   | {
       +type: 'persist/REHYDRATE',
       +payload: ?BaseAppState<*>,
     }
   | {
       +type: 'FETCH_MESSAGES_BEFORE_CURSOR_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_MESSAGES_BEFORE_CURSOR_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_MESSAGES_BEFORE_CURSOR_SUCCESS',
       +payload: FetchMessageInfosPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_MOST_RECENT_MESSAGES_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_MOST_RECENT_MESSAGES_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_MOST_RECENT_MESSAGES_SUCCESS',
       +payload: FetchMessageInfosPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_SINGLE_MOST_RECENT_MESSAGES_FROM_THREADS_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_SINGLE_MOST_RECENT_MESSAGES_FROM_THREADS_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_SINGLE_MOST_RECENT_MESSAGES_FROM_THREADS_SUCCESS',
       +payload: SimpleMessagesPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_TEXT_MESSAGE_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload: RawTextMessageInfo,
     }
   | {
       +type: 'SEND_TEXT_MESSAGE_FAILED',
       +error: true,
       +payload: Error & {
         +localID: string,
         +threadID: string,
       },
       +loadingInfo?: LoadingInfo,
     }
   | {
       +type: 'SEND_TEXT_MESSAGE_SUCCESS',
       +payload: SendMessagePayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_MULTIMEDIA_MESSAGE_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload: RawMultimediaMessageInfo,
     }
   | {
       +type: 'SEND_MULTIMEDIA_MESSAGE_FAILED',
       +error: true,
       +payload: Error & {
         +localID: string,
         +threadID: string,
       },
       +loadingInfo?: LoadingInfo,
     }
   | {
       +type: 'SEND_MULTIMEDIA_MESSAGE_SUCCESS',
       +payload: SendMessagePayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_REACTION_MESSAGE_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload: RawReactionMessageInfo,
     }
   | {
       +type: 'SEND_REACTION_MESSAGE_FAILED',
       +error: true,
       +payload: Error & {
         +localID: string,
         +threadID: string,
         +targetMessageID: string,
         +reaction: string,
         +action: string,
       },
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_REACTION_MESSAGE_SUCCESS',
       +payload: SendMessagePayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEARCH_USERS_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEARCH_USERS_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEARCH_USERS_SUCCESS',
       +payload: UserSearchResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'EXACT_SEARCH_USER_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'EXACT_SEARCH_USER_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'EXACT_SEARCH_USER_SUCCESS',
       +payload: ExactUserSearchResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_DRAFT',
       +payload: {
         +key: string,
         +text: string,
       },
     }
   | {
       +type: 'MOVE_DRAFT',
       +payload: {
         +oldKey: string,
         +newKey: string,
       },
     }
   | {
       +type: 'SET_CLIENT_DB_STORE',
       +payload: {
         +currentUserID: ?string,
         +drafts: $ReadOnlyArray<ClientDBDraftInfo>,
         +messages: ?$ReadOnlyArray<ClientDBMessageInfo>,
         +threadStore: ?ThreadStore,
         +messageStoreThreads: ?$ReadOnlyArray<ClientDBThreadMessageInfo>,
         +reports: ?$ReadOnlyArray<ClientReportCreationRequest>,
       },
     }
   | {
       +type: 'UPDATE_ACTIVITY_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_ACTIVITY_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_ACTIVITY_SUCCESS',
       +payload: ActivityUpdateSuccessPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SET_DEVICE_TOKEN_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SET_DEVICE_TOKEN_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SET_DEVICE_TOKEN_SUCCESS',
       +payload: ?string,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_REPORT_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_REPORT_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_REPORT_SUCCESS',
       +payload?: ClearDeliveredReportsPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_REPORTS_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_REPORTS_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_REPORTS_SUCCESS',
       +payload?: ClearDeliveredReportsPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'QUEUE_REPORTS',
       +payload: QueueReportsPayload,
     }
   | {
       +type: 'SET_URL_PREFIX',
       +payload: string,
     }
   | {
       +type: 'SAVE_MESSAGES',
       +payload: SaveMessagesPayload,
     }
   | {
       +type: 'UPDATE_CALENDAR_THREAD_FILTER',
       +payload: CalendarThreadFilter,
     }
   | {
       +type: 'CLEAR_CALENDAR_THREAD_FILTER',
       +payload?: void,
     }
   | {
       +type: 'SET_CALENDAR_DELETED_FILTER',
       +payload: SetCalendarDeletedFilterPayload,
     }
   | {
       +type: 'UPDATE_SUBSCRIPTION_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_SUBSCRIPTION_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_SUBSCRIPTION_SUCCESS',
       +payload: SubscriptionUpdateResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_CALENDAR_QUERY_STARTED',
       +loadingInfo: LoadingInfo,
       +payload?: CalendarQueryUpdateStartingPayload,
     }
   | {
       +type: 'UPDATE_CALENDAR_QUERY_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_CALENDAR_QUERY_SUCCESS',
       +payload: CalendarQueryUpdateResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FULL_STATE_SYNC',
       +payload: StateSyncFullActionPayload,
     }
   | {
       +type: 'INCREMENTAL_STATE_SYNC',
       +payload: StateSyncIncrementalActionPayload,
     }
   | {
       +type: 'PROCESS_SERVER_REQUESTS',
       +payload: ProcessServerRequestsPayload,
     }
   | {
       +type: 'UPDATE_CONNECTION_STATUS',
       +payload: UpdateConnectionStatusPayload,
     }
   | {
       +type: 'QUEUE_ACTIVITY_UPDATES',
       +payload: QueueActivityUpdatesPayload,
     }
   | {
       +type: 'UNSUPERVISED_BACKGROUND',
       +payload?: void,
     }
   | {
       +type: 'UPDATE_LIFECYCLE_STATE',
       +payload: LifecycleState,
     }
   | {
       +type: 'ENABLE_APP',
       +payload: SupportedApps,
     }
   | {
       +type: 'DISABLE_APP',
       +payload: SupportedApps,
     }
   | {
       +type: 'UPDATE_REPORTS_ENABLED',
       +payload: Shape<EnabledReports>,
     }
   | {
       +type: 'PROCESS_UPDATES',
       +payload: ClientUpdatesResultWithUserInfos,
     }
   | {
       +type: 'PROCESS_MESSAGES',
       +payload: NewMessagesPayload,
     }
   | {
       +type: 'MESSAGE_STORE_PRUNE',
       +payload: MessageStorePrunePayload,
     }
   | {
       +type: 'SET_LATE_RESPONSE',
       +payload: SetLateResponsePayload,
     }
   | {
       +type: 'UPDATE_DISCONNECTED_BAR',
       +payload: UpdateDisconnectedBarPayload,
     }
   | {
       +type: 'REQUEST_ACCESS_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'REQUEST_ACCESS_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'REQUEST_ACCESS_SUCCESS',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_MULTIMEDIA_MESSAGE_MEDIA',
       +payload: UpdateMultimediaMessageMediaPayload,
     }
   | {
       +type: 'CREATE_LOCAL_MESSAGE',
       +payload: LocallyComposedMessageInfo,
     }
   | {
       +type: 'UPDATE_RELATIONSHIPS_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_RELATIONSHIPS_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_RELATIONSHIPS_SUCCESS',
       +payload: RelationshipErrors,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SET_THREAD_UNREAD_STATUS_STARTED',
       +payload: {
         +threadID: string,
         +unread: boolean,
       },
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SET_THREAD_UNREAD_STATUS_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SET_THREAD_UNREAD_STATUS_SUCCESS',
       +payload: SetThreadUnreadStatusPayload,
     }
   | {
       +type: 'SET_USER_SETTINGS_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SET_USER_SETTINGS_SUCCESS',
       +payload: DefaultNotificationPayload,
     }
   | {
       +type: 'SET_USER_SETTINGS_FAILED',
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_MESSAGE_REPORT_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_MESSAGE_REPORT_SUCCESS',
       +payload: MessageReportCreationResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_MESSAGE_REPORT_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FORCE_POLICY_ACKNOWLEDGMENT',
       +payload: ForcePolicyAcknowledgmentPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'POLICY_ACKNOWLEDGMENT_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'POLICY_ACKNOWLEDGMENT_SUCCESS',
       +payload: PolicyAcknowledgmentPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'POLICY_ACKNOWLEDGMENT_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'GET_SIWE_NONCE_STARTED',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'GET_SIWE_NONCE_SUCCESS',
       +payload?: void,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'GET_SIWE_NONCE_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SIWE_AUTH_STARTED',
       +payload: LogInStartingPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SIWE_AUTH_SUCCESS',
       +payload: LogInResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SIWE_AUTH_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'RECORD_NOTIF_PERMISSION_ALERT',
       +payload: { +time: number },
     }
   | {
       +type: 'UPDATE_USER_AVATAR_STARTED',
       +payload: UpdateUserAvatarRequest,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_USER_AVATAR_SUCCESS',
       +payload: UpdateUserAvatarResponse,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_USER_AVATAR_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_EDIT_MESSAGE_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload?: void,
     }
   | {
       +type: 'SEND_EDIT_MESSAGE_SUCCESS',
       +payload: EditMessagePayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEND_EDIT_MESSAGE_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'TOGGLE_MESSAGE_PIN_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload?: void,
     }
   | {
       +type: 'TOGGLE_MESSAGE_PIN_SUCCESS',
       +payload: ToggleMessagePinResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'TOGGLE_MESSAGE_PIN_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_PINNED_MESSAGES_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload?: void,
     }
   | {
       +type: 'FETCH_PINNED_MESSAGES_SUCCESS',
       +payload: FetchPinnedMessagesResult,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_PINNED_MESSAGES_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'VERIFY_INVITE_LINK_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload?: void,
     }
   | {
       +type: 'VERIFY_INVITE_LINK_SUCCESS',
       +payload: InviteLinkVerificationResponse,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'VERIFY_INVITE_LINK_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_PRIMARY_INVITE_LINKS_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload?: void,
     }
   | {
       +type: 'FETCH_PRIMARY_INVITE_LINKS_SUCCESS',
       +payload: FetchInviteLinksResponse,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'FETCH_PRIMARY_INVITE_LINKS_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'UPDATE_CALENDAR_COMMUNITY_FILTER',
       +payload: string,
     }
   | {
       +type: 'CLEAR_CALENDAR_COMMUNITY_FILTER',
       +payload: void,
     }
   | {
       +type: 'UPDATE_CHAT_COMMUNITY_FILTER',
       +payload: string,
     }
   | {
       +type: 'CLEAR_CHAT_COMMUNITY_FILTER',
       +payload: void,
     }
   | {
       +type: 'SEARCH_MESSAGES_STARTED',
       +payload: void,
       +loadingInfo?: LoadingInfo,
     }
   | {
       +type: 'SEARCH_MESSAGES_SUCCESS',
       +payload: SearchMessagesResponse,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SEARCH_MESSAGES_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CREATE_OR_UPDATE_PUBLIC_LINK_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload?: void,
     }
   | {
       +type: 'CREATE_OR_UPDATE_PUBLIC_LINK_SUCCESS',
       +payload: InviteLink,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'CREATE_OR_UPDATE_PUBLIC_LINK_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'DISABLE_INVITE_LINK_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload?: void,
     }
   | {
       +type: 'DISABLE_INVITE_LINK_SUCCESS',
       +payload: DisableInviteLinkPayload,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'DISABLE_INVITE_LINK_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'GET_OLM_SESSION_INITIALIZATION_DATA_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload?: void,
     }
   | {
       +type: 'GET_OLM_SESSION_INITIALIZATION_DATA_SUCCESS',
       +payload: GetOlmSessionInitializationDataResponse,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'GET_OLM_SESSION_INITIALIZATION_DATA_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'SET_DATA_LOADED',
       +payload: {
         +dataLoaded: boolean,
       },
     }
   | {
       +type: 'GET_VERSION_STARTED',
       +loadingInfo?: LoadingInfo,
       +payload?: void,
     }
   | {
       +type: 'GET_VERSION_SUCCESS',
       +payload: VersionResponse,
       +loadingInfo: LoadingInfo,
     }
   | {
       +type: 'GET_VERSION_FAILED',
       +error: true,
       +payload: Error,
       +loadingInfo: LoadingInfo,
+    }
+  | {
+      +type: 'UPDATE_LAST_COMMUNICATED_PLATFORM_DETAILS',
+      +payload: LastCommunicatedPlatformDetails,
     };
 
 export type ActionPayload = ?(Object | Array<*> | $ReadOnlyArray<*> | string);
 export type SuperAction = {
   type: string,
   payload?: ActionPayload,
   loadingInfo?: LoadingInfo,
   error?: boolean,
 };
 type ThunkedAction = (dispatch: Dispatch) => void;
 export type PromisedAction = (dispatch: Dispatch) => Promise<void>;
 export type Dispatch = ((promisedAction: PromisedAction) => Promise<void>) &
   ((thunkedAction: ThunkedAction) => void) &
   ((action: SuperAction) => boolean);
 
 // This is lifted from redux-persist/lib/constants.js
 // I don't want to add redux-persist to the web/server bundles...
 // import { REHYDRATE } from 'redux-persist';
 export const rehydrateActionType = 'persist/REHYDRATE';
diff --git a/native/chat/toggle-pin-modal.react.js b/native/chat/toggle-pin-modal.react.js
index 514182024..5c14818c9 100644
--- a/native/chat/toggle-pin-modal.react.js
+++ b/native/chat/toggle-pin-modal.react.js
@@ -1,166 +1,167 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 import { Text, View } from 'react-native';
 
 import {
   toggleMessagePin,
   toggleMessagePinActionTypes,
 } from 'lib/actions/thread-actions.js';
+import type { RawMessageInfo } from 'lib/types/message-types.js';
 import { type ThreadInfo } from 'lib/types/thread-types.js';
 import {
   useServerCall,
   useDispatchActionPromise,
 } from 'lib/utils/action-utils.js';
 
 import MessageResult from './message-result.react.js';
 import Button from '../components/button.react.js';
 import Modal from '../components/modal.react.js';
 import type { AppNavigationProp } from '../navigation/app-navigator.react.js';
 import type { NavigationRoute } from '../navigation/route-names.js';
 import { useStyles } from '../themes/colors.js';
 import type { ChatMessageInfoItemWithHeight } from '../types/chat-types';
 
 export type TogglePinModalParams = {
   +item: ChatMessageInfoItemWithHeight,
   +threadInfo: ThreadInfo,
 };
 
 type TogglePinModalProps = {
   +navigation: AppNavigationProp<'TogglePinModal'>,
   +route: NavigationRoute<'TogglePinModal'>,
 };
 
 function TogglePinModal(props: TogglePinModalProps): React.Node {
   const { navigation, route } = props;
   const { item, threadInfo } = route.params;
   const { messageInfo, isPinned } = item;
   const styles = useStyles(unboundStyles);
 
   const callToggleMessagePin = useServerCall(toggleMessagePin);
   const dispatchActionPromise = useDispatchActionPromise();
 
   const modalInfo = React.useMemo(() => {
     if (isPinned) {
       return {
         name: 'Remove Pinned Message',
         action: 'unpin',
         confirmationText:
           'Are you sure you want to remove this pinned message?',
         buttonText: 'Remove Pinned Message',
         buttonStyle: styles.removePinButton,
       };
     }
 
     return {
       name: 'Pin Message',
       action: 'pin',
       confirmationText:
         'You may pin this message to the channel you are ' +
         'currently viewing. To unpin a message, select the pinned messages ' +
         'icon in the channel.',
       buttonText: 'Pin Message',
       buttonStyle: styles.pinButton,
     };
   }, [isPinned, styles.pinButton, styles.removePinButton]);
 
   const createToggleMessagePinPromise = React.useCallback(async () => {
     invariant(messageInfo.id, 'messageInfo.id should be defined');
     const result = await callToggleMessagePin({
       messageID: messageInfo.id,
       action: modalInfo.action,
     });
-    return {
+    return ({
       newMessageInfos: result.newMessageInfos,
       threadID: result.threadID,
-    };
+    }: { +newMessageInfos: $ReadOnlyArray<RawMessageInfo>, +threadID: string });
   }, [callToggleMessagePin, messageInfo.id, modalInfo.action]);
 
   const onPress = React.useCallback(() => {
     dispatchActionPromise(
       toggleMessagePinActionTypes,
       createToggleMessagePinPromise(),
     );
 
     navigation.goBack();
   }, [createToggleMessagePinPromise, dispatchActionPromise, navigation]);
 
   const onCancel = React.useCallback(() => {
     navigation.goBack();
   }, [navigation]);
 
   return (
     <Modal modalStyle={styles.modal}>
       <Text style={styles.modalHeader}>{modalInfo.name}</Text>
       <Text style={styles.modalConfirmationText}>
         {modalInfo.confirmationText}
       </Text>
       <MessageResult
         item={item}
         threadInfo={threadInfo}
         navigation={navigation}
         route={route}
         messageVerticalBounds={null}
         scrollable={true}
       />
       <View style={styles.buttonsContainer}>
         <Button style={modalInfo.buttonStyle} onPress={onPress}>
           <Text style={styles.textColor}>{modalInfo.buttonText}</Text>
         </Button>
         <Button style={styles.cancelButton} onPress={onCancel}>
           <Text style={styles.textColor}>Cancel</Text>
         </Button>
       </View>
     </Modal>
   );
 }
 
 const unboundStyles = {
   modal: {
     backgroundColor: 'modalForeground',
     borderColor: 'modalForegroundBorder',
   },
   modalHeader: {
     fontSize: 18,
     color: 'modalForegroundLabel',
   },
   modalConfirmationText: {
     fontSize: 12,
     color: 'modalBackgroundLabel',
     marginTop: 4,
   },
   buttonsContainer: {
     flexDirection: 'column',
     flex: 1,
     justifyContent: 'flex-end',
     marginBottom: 0,
     height: 72,
     paddingHorizontal: 16,
   },
   removePinButton: {
     borderRadius: 5,
     height: 48,
     justifyContent: 'center',
     alignItems: 'center',
     backgroundColor: 'vibrantRedButton',
   },
   pinButton: {
     borderRadius: 5,
     height: 48,
     justifyContent: 'center',
     alignItems: 'center',
     backgroundColor: 'purpleButton',
   },
   cancelButton: {
     borderRadius: 5,
     height: 48,
     justifyContent: 'center',
     alignItems: 'center',
   },
   textColor: {
     color: 'modalButtonLabel',
   },
 };
 
 export default TogglePinModal;
diff --git a/native/redux/redux-setup.js b/native/redux/redux-setup.js
index a1c861cc3..340fe7bce 100644
--- a/native/redux/redux-setup.js
+++ b/native/redux/redux-setup.js
@@ -1,501 +1,502 @@
 // @flow
 
 import { AppState as NativeAppState, Platform, Alert } from 'react-native';
 import Orientation from 'react-native-orientation-locker';
 import { createStore, applyMiddleware, type Store, compose } from 'redux';
 import { persistStore, persistReducer } from 'redux-persist';
 import thunk from 'redux-thunk';
 
 import { setClientDBStoreActionType } from 'lib/actions/client-db-store-actions.js';
 import { siweAuthActionTypes } from 'lib/actions/siwe-actions.js';
 import {
   logOutActionTypes,
   deleteAccountActionTypes,
   logInActionTypes,
 } from 'lib/actions/user-actions.js';
 import baseReducer from 'lib/reducers/master-reducer.js';
 import { processThreadStoreOperations } from 'lib/reducers/thread-reducer.js';
 import {
   invalidSessionDowngrade,
   invalidSessionRecovery,
 } from 'lib/shared/session-utils.js';
 import { isStaff } from 'lib/shared/staff-utils.js';
 import { defaultEnabledApps } from 'lib/types/enabled-apps.js';
 import { defaultCalendarFilters } from 'lib/types/filter-types.js';
 import type { Dispatch, BaseAction } from 'lib/types/redux-types.js';
 import { rehydrateActionType } from 'lib/types/redux-types.js';
 import type { SetSessionPayload } from 'lib/types/session-types.js';
 import { defaultConnectionInfo } from 'lib/types/socket-types.js';
 import type { ThreadStoreOperation } from 'lib/types/thread-types.js';
 import { reduxLoggerMiddleware } from 'lib/utils/action-logger.js';
 import { setNewSessionActionType } from 'lib/utils/action-utils.js';
 import { defaultNotifPermissionAlertInfo } from 'lib/utils/push-alerts.js';
 
 import {
   resetUserStateActionType,
   updateDimensionsActiveType,
   updateConnectivityActiveType,
   updateThemeInfoActionType,
   updateDeviceCameraInfoActionType,
   updateDeviceOrientationActionType,
   updateThreadLastNavigatedActionType,
   backgroundActionTypes,
   setReduxStateActionType,
   setStoreLoadedActionType,
   type Action,
 } from './action-types.js';
 import { remoteReduxDevServerConfig } from './dev-tools.js';
 import { defaultDimensionsInfo } from './dimensions-updater.react.js';
 import { persistConfig, setPersistor } from './persist.js';
 import { processDBStoreOperations } from './redux-utils.js';
 import type { AppState } from './state-types.js';
 import reduceGlobalThemeInfo from './theme-reducer.js';
 import { defaultNavInfo } from '../navigation/default-state.js';
 import { getGlobalNavContext } from '../navigation/icky-global.js';
 import { activeMessageListSelector } from '../navigation/nav-selectors.js';
 import reactotron from '../reactotron.js';
 import { defaultDeviceCameraInfo } from '../types/camera.js';
 import { defaultConnectivityInfo } from '../types/connectivity.js';
 import { defaultGlobalThemeInfo } from '../types/themes.js';
 import { isStaffRelease } from '../utils/staff-utils.js';
 import {
   defaultURLPrefix,
   natNodeServer,
   setCustomServer,
   getDevServerHostname,
 } from '../utils/url-utils.js';
 
 const defaultState = ({
   navInfo: defaultNavInfo,
   currentUserInfo: null,
   draftStore: { drafts: {} },
   entryStore: {
     entryInfos: {},
     daysToEntries: {},
     lastUserInteractionCalendar: 0,
   },
   threadStore: {
     threadInfos: {},
   },
   userStore: {
     userInfos: {},
     inconsistencyReports: [],
   },
   messageStore: {
     messages: {},
     threads: {},
     local: {},
     currentAsOf: 0,
   },
   storeLoaded: false,
   updatesCurrentAsOf: 0,
   loadingStatuses: {},
   calendarFilters: defaultCalendarFilters,
   cookie: null,
   deviceToken: null,
   dataLoaded: false,
   urlPrefix: defaultURLPrefix,
   customServer: natNodeServer,
   notifPermissionAlertInfo: defaultNotifPermissionAlertInfo,
   connection: defaultConnectionInfo(Platform.OS),
   watchedThreadIDs: [],
   lifecycleState: 'active',
   enabledApps: defaultEnabledApps,
   reportStore: {
     enabledReports: {
       crashReports: __DEV__,
       inconsistencyReports: __DEV__,
       mediaReports: __DEV__,
     },
     queuedReports: [],
   },
   nextLocalID: 0,
   _persist: null,
   dimensions: defaultDimensionsInfo,
   connectivity: defaultConnectivityInfo,
   globalThemeInfo: defaultGlobalThemeInfo,
   deviceCameraInfo: defaultDeviceCameraInfo,
   deviceOrientation: Orientation.getInitialOrientation(),
   frozen: false,
   userPolicies: {},
   commServicesAccessToken: null,
   inviteLinksStore: {
     links: {},
   },
+  lastCommunicatedPlatformDetails: {},
 }: AppState);
 
 function reducer(state: AppState = defaultState, action: Action) {
   if (action.type === setReduxStateActionType) {
     return action.payload.state;
   }
 
   // We want to alert staff/developers if there's a difference between the keys
   // we expect to see REHYDRATED and the keys that are actually REHYDRATED.
   // Context: https://linear.app/comm/issue/ENG-2127/
   if (
     action.type === rehydrateActionType &&
     (__DEV__ ||
       isStaffRelease ||
       (state.currentUserInfo &&
         state.currentUserInfo.id &&
         isStaff(state.currentUserInfo.id)))
   ) {
     // 1. Construct set of keys expected to be REHYDRATED
     const defaultKeys = Object.keys(defaultState);
     const expectedKeys = defaultKeys.filter(
       each => !persistConfig.blacklist.includes(each),
     );
     const expectedKeysSet = new Set(expectedKeys);
 
     // 2. Construct set of keys actually REHYDRATED
     const rehydratedKeys = Object.keys(action.payload ?? {});
     const rehydratedKeysSet = new Set(rehydratedKeys);
 
     // 3. Determine the difference between the two sets
     const expectedKeysNotRehydrated = expectedKeys.filter(
       each => !rehydratedKeysSet.has(each),
     );
     const rehydratedKeysNotExpected = rehydratedKeys.filter(
       each => !expectedKeysSet.has(each),
     );
 
     // 4. Display alerts with the differences between the two sets
     if (expectedKeysNotRehydrated.length > 0) {
       Alert.alert(
         `EXPECTED KEYS NOT REHYDRATED: ${JSON.stringify(
           expectedKeysNotRehydrated,
         )}`,
       );
     }
     if (rehydratedKeysNotExpected.length > 0) {
       Alert.alert(
         `REHYDRATED KEYS NOT EXPECTED: ${JSON.stringify(
           rehydratedKeysNotExpected,
         )}`,
       );
     }
   }
 
   if (
     (action.type === setNewSessionActionType &&
       invalidSessionDowngrade(
         state,
         action.payload.sessionChange.currentUserInfo,
         action.payload.preRequestUserState,
       )) ||
     (action.type === logOutActionTypes.success &&
       invalidSessionDowngrade(
         state,
         action.payload.currentUserInfo,
         action.payload.preRequestUserState,
       )) ||
     (action.type === deleteAccountActionTypes.success &&
       invalidSessionDowngrade(
         state,
         action.payload.currentUserInfo,
         action.payload.preRequestUserState,
       ))
   ) {
     return state;
   }
   if (
     (action.type === setNewSessionActionType &&
       action.payload.sessionChange.currentUserInfo &&
       invalidSessionRecovery(
         state,
         action.payload.sessionChange.currentUserInfo,
         action.payload.logInActionSource,
       )) ||
     ((action.type === logInActionTypes.success ||
       action.type === siweAuthActionTypes.success) &&
       invalidSessionRecovery(
         state,
         action.payload.currentUserInfo,
         action.payload.logInActionSource,
       ))
   ) {
     return state;
   }
 
   state = {
     ...state,
     globalThemeInfo: reduceGlobalThemeInfo(state.globalThemeInfo, action),
   };
 
   if (action.type === setCustomServer) {
     return {
       ...state,
       customServer: action.payload,
     };
   } else if (action.type === resetUserStateActionType) {
     const cookie =
       state.cookie && state.cookie.startsWith('anonymous=')
         ? state.cookie
         : null;
     const currentUserInfo =
       state.currentUserInfo && state.currentUserInfo.anonymous
         ? state.currentUserInfo
         : null;
     return {
       ...state,
       currentUserInfo,
       cookie,
     };
   } else if (action.type === updateDimensionsActiveType) {
     return {
       ...state,
       dimensions: {
         ...state.dimensions,
         ...action.payload,
       },
     };
   } else if (action.type === updateConnectivityActiveType) {
     return {
       ...state,
       connectivity: action.payload,
     };
   } else if (action.type === updateThemeInfoActionType) {
     // Handled above by reduceGlobalThemeInfo
     return state;
   } else if (action.type === updateDeviceCameraInfoActionType) {
     return {
       ...state,
       deviceCameraInfo: {
         ...state.deviceCameraInfo,
         ...action.payload,
       },
     };
   } else if (action.type === updateDeviceOrientationActionType) {
     return {
       ...state,
       deviceOrientation: action.payload,
     };
   } else if (action.type === updateThreadLastNavigatedActionType) {
     const { threadID, time } = action.payload;
     if (state.messageStore.threads[threadID]) {
       const updatedThreads = {
         [threadID]: {
           ...state.messageStore.threads[threadID],
           lastNavigatedTo: time,
         },
       };
 
       state = {
         ...state,
         messageStore: {
           ...state.messageStore,
           threads: {
             ...state.messageStore.threads,
             ...updatedThreads,
           },
         },
       };
 
       processDBStoreOperations({
         draftStoreOperations: [],
         messageStoreOperations: [
           {
             type: 'replace_threads',
             payload: {
               threads: updatedThreads,
             },
           },
         ],
         threadStoreOperations: [],
         reportStoreOperations: [],
       });
     }
     return state;
   }
 
   if (action.type === setNewSessionActionType) {
     sessionInvalidationAlert(action.payload);
     state = {
       ...state,
       cookie: action.payload.sessionChange.cookie,
     };
   }
   if (action.type === setStoreLoadedActionType) {
     return {
       ...state,
       storeLoaded: true,
     };
   }
   if (action.type === setClientDBStoreActionType) {
     state = {
       ...state,
       storeLoaded: true,
     };
     const currentLoggedInUserID = state.currentUserInfo?.anonymous
       ? undefined
       : state.currentUserInfo?.id;
     const actionCurrentLoggedInUserID = action.payload.currentUserID;
     if (
       !currentLoggedInUserID ||
       !actionCurrentLoggedInUserID ||
       actionCurrentLoggedInUserID !== currentLoggedInUserID
     ) {
       // If user is logged out now, was logged out at the time action was
       // dispatched or their ID changed between action dispatch and a
       // call to reducer we ignore the SQLite data since it is not valid
       return state;
     }
   }
 
   const baseReducerResult = baseReducer(state, (action: BaseAction));
   state = baseReducerResult.state;
 
   const { storeOperations } = baseReducerResult;
   const {
     draftStoreOperations,
     threadStoreOperations,
     messageStoreOperations,
     reportStoreOperations,
   } = storeOperations;
 
   const fixUnreadActiveThreadResult = fixUnreadActiveThread(state, action);
   state = fixUnreadActiveThreadResult.state;
 
   const threadStoreOperationsWithUnreadFix = [
     ...threadStoreOperations,
     ...fixUnreadActiveThreadResult.threadStoreOperations,
   ];
 
   processDBStoreOperations({
     draftStoreOperations,
     messageStoreOperations,
     threadStoreOperations: threadStoreOperationsWithUnreadFix,
     reportStoreOperations,
   });
 
   return state;
 }
 
 function sessionInvalidationAlert(payload: SetSessionPayload) {
   if (
     !payload.sessionChange.cookieInvalidated ||
     !payload.preRequestUserState ||
     !payload.preRequestUserState.currentUserInfo ||
     payload.preRequestUserState.currentUserInfo.anonymous
   ) {
     return;
   }
   if (payload.error === 'client_version_unsupported') {
     const app = Platform.select({
       ios: 'App Store',
       android: 'Play Store',
     });
     Alert.alert(
       'App out of date',
       'Your app version is pretty old, and the server doesn’t know how to ' +
         `speak to it anymore. Please use the ${app} app to update!`,
       [{ text: 'OK' }],
       { cancelable: true },
     );
   } else {
     Alert.alert(
       'Session invalidated',
       'We’re sorry, but your session was invalidated by the server. ' +
         'Please log in again.',
       [{ text: 'OK' }],
       { cancelable: true },
     );
   }
 }
 
 // Makes sure a currently focused thread is never unread. Note that we consider
 // a backgrounded NativeAppState to actually be active if it last changed to
 // inactive more than 10 seconds ago. This is because there is a delay when
 // NativeAppState is updating in response to a foreground, and actions don't get
 // processed more than 10 seconds after a backgrounding anyways. However we
 // don't consider this for action types that can be expected to happen while the
 // app is backgrounded.
 type FixUnreadActiveThreadResult = {
   +state: AppState,
   +threadStoreOperations: $ReadOnlyArray<ThreadStoreOperation>,
 };
 function fixUnreadActiveThread(
   state: AppState,
   action: *,
 ): FixUnreadActiveThreadResult {
   const navContext = getGlobalNavContext();
   const activeThread = activeMessageListSelector(navContext);
   if (
     !activeThread ||
     !state.threadStore.threadInfos[activeThread]?.currentUser.unread ||
     (NativeAppState.currentState !== 'active' &&
       (appLastBecameInactive + 10000 >= Date.now() ||
         backgroundActionTypes.has(action.type)))
   ) {
     return { state, threadStoreOperations: [] };
   }
 
   const updatedActiveThreadInfo = {
     ...state.threadStore.threadInfos[activeThread],
     currentUser: {
       ...state.threadStore.threadInfos[activeThread].currentUser,
       unread: false,
     },
   };
 
   const threadStoreOperations = [
     {
       type: 'replace',
       payload: {
         id: activeThread,
         threadInfo: updatedActiveThreadInfo,
       },
     },
   ];
 
   const updatedThreadStore = processThreadStoreOperations(
     state.threadStore,
     threadStoreOperations,
   );
 
   return {
     state: { ...state, threadStore: updatedThreadStore },
     threadStoreOperations,
   };
 }
 
 let appLastBecameInactive = 0;
 function appBecameInactive() {
   appLastBecameInactive = Date.now();
 }
 
 const middleware = applyMiddleware(thunk, reduxLoggerMiddleware);
 
 let composeFunc = compose;
 if (__DEV__ && global.HermesInternal) {
   const { composeWithDevTools } = require('remote-redux-devtools/src/index.js');
   composeFunc = composeWithDevTools({
     name: 'Redux',
     hostname: getDevServerHostname(),
     ...remoteReduxDevServerConfig,
   });
 } else if (global.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__) {
   composeFunc = global.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__({
     name: 'Redux',
   });
 }
 
 let enhancers;
 if (reactotron) {
   enhancers = composeFunc(middleware, reactotron.createEnhancer());
 } else {
   enhancers = composeFunc(middleware);
 }
 
 const store: Store<AppState, *> = createStore(
   persistReducer(persistConfig, reducer),
   defaultState,
   enhancers,
 );
 const persistor = persistStore(store);
 setPersistor(persistor);
 
 const unsafeDispatch: any = store.dispatch;
 const dispatch: Dispatch = unsafeDispatch;
 
 export { store, dispatch, appBecameInactive };
diff --git a/native/redux/state-types.js b/native/redux/state-types.js
index cb14a3bf4..4a4d956b5 100644
--- a/native/redux/state-types.js
+++ b/native/redux/state-types.js
@@ -1,62 +1,64 @@
 // @flow
 
 import type { Orientations } from 'react-native-orientation-locker';
 import type { PersistState } from 'redux-persist/es/types.js';
 
+import type { LastCommunicatedPlatformDetails } from 'lib/types/device-types.js';
 import type { DraftStore } from 'lib/types/draft-types.js';
 import type { EnabledApps } from 'lib/types/enabled-apps.js';
 import type { EntryStore } from 'lib/types/entry-types.js';
 import type { CalendarFilter } from 'lib/types/filter-types.js';
 import type { LifecycleState } from 'lib/types/lifecycle-state-types.js';
 import type { InviteLinksStore } from 'lib/types/link-types.js';
 import type { LoadingStatus } from 'lib/types/loading-types.js';
 import type { MessageStore } from 'lib/types/message-types.js';
 import type { UserPolicies } from 'lib/types/policy-types.js';
 import type { ReportStore } from 'lib/types/report-types.js';
 import type { ConnectionInfo } from 'lib/types/socket-types.js';
 import type { ThreadStore } from 'lib/types/thread-types.js';
 import type { CurrentUserInfo, UserStore } from 'lib/types/user-types.js';
 import type { NotifPermissionAlertInfo } from 'lib/utils/push-alerts.js';
 
 import type { DimensionsInfo } from './dimensions-updater.react.js';
 import type { NavInfo } from '../navigation/default-state.js';
 import type { DeviceCameraInfo } from '../types/camera.js';
 import type { ConnectivityInfo } from '../types/connectivity.js';
 import type { GlobalThemeInfo } from '../types/themes.js';
 
 export type AppState = {
   navInfo: NavInfo,
   currentUserInfo: ?CurrentUserInfo,
   draftStore: DraftStore,
   entryStore: EntryStore,
   threadStore: ThreadStore,
   userStore: UserStore,
   messageStore: MessageStore,
   storeLoaded: boolean,
   updatesCurrentAsOf: number,
   loadingStatuses: { [key: string]: { [idx: number]: LoadingStatus } },
   calendarFilters: $ReadOnlyArray<CalendarFilter>,
   cookie: ?string,
   deviceToken: ?string,
   dataLoaded: boolean,
   urlPrefix: string,
   customServer: ?string,
   notifPermissionAlertInfo: NotifPermissionAlertInfo,
   connection: ConnectionInfo,
   watchedThreadIDs: $ReadOnlyArray<string>,
   lifecycleState: LifecycleState,
   enabledApps: EnabledApps,
   reportStore: ReportStore,
   nextLocalID: number,
   _persist: ?PersistState,
   sessionID?: void,
   dimensions: DimensionsInfo,
   connectivity: ConnectivityInfo,
   globalThemeInfo: GlobalThemeInfo,
   deviceCameraInfo: DeviceCameraInfo,
   deviceOrientation: Orientations,
   frozen: boolean,
   userPolicies: UserPolicies,
   +commServicesAccessToken: ?string,
   +inviteLinksStore: InviteLinksStore,
+  +lastCommunicatedPlatformDetails: LastCommunicatedPlatformDetails,
 };
diff --git a/web/modals/chat/toggle-pin-modal.react.js b/web/modals/chat/toggle-pin-modal.react.js
index 0a65ad20f..c44f6758a 100644
--- a/web/modals/chat/toggle-pin-modal.react.js
+++ b/web/modals/chat/toggle-pin-modal.react.js
@@ -1,129 +1,133 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 
 import {
   toggleMessagePin,
   toggleMessagePinActionTypes,
 } from 'lib/actions/thread-actions.js';
 import { useModalContext } from 'lib/components/modal-provider.react.js';
 import type { ChatMessageInfoItem } from 'lib/selectors/chat-selectors.js';
 import { modifyItemForResultScreen } from 'lib/shared/message-utils.js';
+import type { RawMessageInfo } from 'lib/types/message-types.js';
 import type { ThreadInfo } from 'lib/types/thread-types.js';
 import {
   useServerCall,
   useDispatchActionPromise,
 } from 'lib/utils/action-utils.js';
 
 import css from './toggle-pin-modal.css';
 import Button, { buttonThemes } from '../../components/button.react.js';
 import MessageResult from '../../components/message-result.react.js';
 import Modal from '../modal.react.js';
 
 type TogglePinModalProps = {
   +item: ChatMessageInfoItem,
   +threadInfo: ThreadInfo,
 };
 
 function TogglePinModal(props: TogglePinModalProps): React.Node {
   const { item, threadInfo } = props;
   const { messageInfo, isPinned } = item;
   const { popModal } = useModalContext();
 
   const callToggleMessagePin = useServerCall(toggleMessagePin);
   const dispatchActionPromise = useDispatchActionPromise();
 
   const modalInfo = React.useMemo(() => {
     if (isPinned) {
       return {
         name: 'Remove Pinned Message',
         action: 'unpin',
         confirmationText:
           'Are you sure you want to remove this pinned message?',
         buttonText: 'Remove Pinned Message',
         buttonColor: buttonThemes.danger,
       };
     }
 
     return {
       name: 'Pin Message',
       action: 'pin',
       confirmationText: `You may pin this message to the channel 
         you are currently viewing. To unpin a message, select the pinned 
         messages icon in the channel.`,
       buttonText: 'Pin Message',
       buttonColor: buttonThemes.standard,
     };
   }, [isPinned]);
 
   // We want to remove inline engagement (threadCreatedFromMessage / reactions)
   // and the message header (startsConversation). We also want to set isViewer
   // to false so that the message is left-aligned and uncolored.
   const modifiedItem = React.useMemo(() => {
     if (item.messageInfoType !== 'composable') {
       return item;
     }
 
     const strippedItem = {
       ...item,
       threadCreatedFromMessage: undefined,
       reactions: {},
     };
     return modifyItemForResultScreen(strippedItem);
   }, [item]);
 
   const onClick = React.useCallback(() => {
     const createToggleMessagePinPromise = async () => {
       invariant(messageInfo.id, 'messageInfo.id should be defined');
       const result = await callToggleMessagePin({
         messageID: messageInfo.id,
         action: modalInfo.action,
       });
-      return {
+      return ({
         newMessageInfos: result.newMessageInfos,
         threadID: result.threadID,
-      };
+      }: {
+        +newMessageInfos: $ReadOnlyArray<RawMessageInfo>,
+        +threadID: string,
+      });
     };
 
     dispatchActionPromise(
       toggleMessagePinActionTypes,
       createToggleMessagePinPromise(),
     );
     popModal();
   }, [
     modalInfo,
     callToggleMessagePin,
     dispatchActionPromise,
     messageInfo.id,
     popModal,
   ]);
 
   return (
     <Modal name={modalInfo.name} onClose={popModal} size="large">
       <div className={css.confirmationText}>{modalInfo.confirmationText}</div>
       <div className={css.messageContainer}>
         <MessageResult
           item={modifiedItem}
           threadInfo={threadInfo}
           scrollable={true}
         />
       </div>
       <div className={css.buttonContainer}>
         <Button
           variant="filled"
           className={css.togglePinButton}
           buttonColor={modalInfo.buttonColor}
           onClick={onClick}
         >
           {modalInfo.buttonText}
         </Button>
         <div className={css.cancelButton} onClick={popModal}>
           Cancel
         </div>
       </div>
     </Modal>
   );
 }
 
 export default TogglePinModal;
diff --git a/web/redux/persist.js b/web/redux/persist.js
index 67c53adbc..d6564e596 100644
--- a/web/redux/persist.js
+++ b/web/redux/persist.js
@@ -1,79 +1,80 @@
 // @flow
 
 import type { PersistConfig } from 'redux-persist/src/types.js';
 
 import { isDev } from 'lib/utils/dev-utils.js';
 
 import commReduxStorageEngine from './comm-redux-storage-engine.js';
 import { createAsyncMigrate } from './create-async-migrate.js';
 import type { AppState } from './redux-setup.js';
 import { databaseModule } from '../database/database-module-provider.js';
 import { isSQLiteSupported } from '../database/utils/db-utils.js';
 import { workerRequestMessageTypes } from '../types/worker-types.js';
 
 declare var preloadedState: AppState;
 
 const initiallyLoggedInUserID = preloadedState.currentUserInfo?.anonymous
   ? undefined
   : preloadedState.currentUserInfo?.id;
 const isDatabaseSupported = isSQLiteSupported(initiallyLoggedInUserID);
 
 const migrations = {
   [1]: async state => {
     const {
       primaryIdentityPublicKey,
       ...stateWithoutPrimaryIdentityPublicKey
     } = state;
     return {
       ...stateWithoutPrimaryIdentityPublicKey,
       cryptoStore: {
         primaryAccount: null,
         primaryIdentityKeys: null,
         notificationAccount: null,
         notificationIdentityKeys: null,
       },
     };
   },
   [2]: async state => {
     if (!isDatabaseSupported) {
       return state;
     }
 
     const { drafts } = state.draftStore;
     const draftStoreOperations = [];
     for (const key in drafts) {
       const text = drafts[key];
       draftStoreOperations.push({
         type: 'update',
         payload: { key, text },
       });
     }
 
     await databaseModule.schedule({
       type: workerRequestMessageTypes.PROCESS_STORE_OPERATIONS,
       storeOperations: { draftStoreOperations },
     });
 
     return state;
   },
 };
 
 const persistWhitelist = [
   'enabledApps',
   'deviceID',
   'cryptoStore',
   'notifPermissionAlertInfo',
   'commServicesAccessToken',
+  'lastCommunicatedPlatformDetails',
 ];
 
 const persistConfig: PersistConfig = {
   key: 'root',
   storage: commReduxStorageEngine,
   whitelist: isDatabaseSupported
     ? persistWhitelist
     : [...persistWhitelist, 'draftStore'],
   migrate: (createAsyncMigrate(migrations, { debug: isDev }): any),
   version: 2,
 };
 
 export { persistConfig };
diff --git a/web/redux/redux-setup.js b/web/redux/redux-setup.js
index 1e3bd4bfd..ab97303fc 100644
--- a/web/redux/redux-setup.js
+++ b/web/redux/redux-setup.js
@@ -1,318 +1,320 @@
 // @flow
 
 import invariant from 'invariant';
 import type { PersistState } from 'redux-persist/es/types.js';
 
 import {
   logOutActionTypes,
   deleteAccountActionTypes,
 } from 'lib/actions/user-actions.js';
 import { convertReportStoreOperationToClientDBReportStoreOperation } from 'lib/ops/report-store-ops.js';
 import baseReducer from 'lib/reducers/master-reducer.js';
 import { mostRecentlyReadThreadSelector } from 'lib/selectors/thread-selectors.js';
 import { isLoggedIn } from 'lib/selectors/user-selectors.js';
 import { invalidSessionDowngrade } from 'lib/shared/session-utils.js';
 import type { Shape } from 'lib/types/core.js';
 import type {
   CryptoStore,
   OLMIdentityKeys,
   PickledOLMAccount,
 } from 'lib/types/crypto-types.js';
+import type { LastCommunicatedPlatformDetails } from 'lib/types/device-types.js';
 import type { DraftStore } from 'lib/types/draft-types.js';
 import type { EnabledApps } from 'lib/types/enabled-apps.js';
 import type { EntryStore } from 'lib/types/entry-types.js';
 import { type CalendarFilter } from 'lib/types/filter-types.js';
 import type { LifecycleState } from 'lib/types/lifecycle-state-types.js';
 import type { InviteLinksStore } from 'lib/types/link-types.js';
 import type { LoadingStatus } from 'lib/types/loading-types.js';
 import type { MessageStore } from 'lib/types/message-types.js';
 import type { UserPolicies } from 'lib/types/policy-types.js';
 import type { BaseAction } from 'lib/types/redux-types.js';
 import type { ReportStore } from 'lib/types/report-types.js';
 import type { ConnectionInfo } from 'lib/types/socket-types.js';
 import type { ThreadStore } from 'lib/types/thread-types.js';
 import type { CurrentUserInfo, UserStore } from 'lib/types/user-types.js';
 import { setNewSessionActionType } from 'lib/utils/action-utils.js';
 import type { NotifPermissionAlertInfo } from 'lib/utils/push-alerts.js';
 
 import {
   updateWindowActiveActionType,
   setDeviceIDActionType,
   updateNavInfoActionType,
   updateWindowDimensionsActionType,
 } from './action-types.js';
 import { reduceCommunityPickerStore } from './community-picker-reducer.js';
 import {
   reduceCryptoStore,
   setPrimaryIdentityKeys,
   setNotificationIdentityKeys,
   setPickledNotificationAccount,
   setPickledPrimaryAccount,
 } from './crypto-store-reducer.js';
 import { reduceDeviceID } from './device-id-reducer.js';
 import reduceNavInfo from './nav-reducer.js';
 import { getVisibility } from './visibility.js';
 import { databaseModule } from '../database/database-module-provider.js';
 import { activeThreadSelector } from '../selectors/nav-selectors.js';
 import { type NavInfo } from '../types/nav-types.js';
 import { workerRequestMessageTypes } from '../types/worker-types.js';
 
 export type WindowDimensions = { width: number, height: number };
 
 export type CommunityPickerStore = {
   +chat: ?string,
   +calendar: ?string,
 };
 
 export type AppState = {
   navInfo: NavInfo,
   deviceID: ?string,
   currentUserInfo: ?CurrentUserInfo,
   draftStore: DraftStore,
   sessionID: ?string,
   entryStore: EntryStore,
   threadStore: ThreadStore,
   userStore: UserStore,
   messageStore: MessageStore,
   updatesCurrentAsOf: number,
   loadingStatuses: { [key: string]: { [idx: number]: LoadingStatus } },
   calendarFilters: $ReadOnlyArray<CalendarFilter>,
   communityPickerStore: CommunityPickerStore,
   urlPrefix: string,
   windowDimensions: WindowDimensions,
   cookie?: void,
   deviceToken: ?string,
   baseHref: string,
   notifPermissionAlertInfo: NotifPermissionAlertInfo,
   connection: ConnectionInfo,
   watchedThreadIDs: $ReadOnlyArray<string>,
   lifecycleState: LifecycleState,
   enabledApps: EnabledApps,
   reportStore: ReportStore,
   nextLocalID: number,
   dataLoaded: boolean,
   windowActive: boolean,
   userPolicies: UserPolicies,
   cryptoStore: CryptoStore,
   pushApiPublicKey: ?string,
   _persist: ?PersistState,
   +commServicesAccessToken: ?string,
   +inviteLinksStore: InviteLinksStore,
+  +lastCommunicatedPlatformDetails: LastCommunicatedPlatformDetails,
 };
 
 export type Action =
   | BaseAction
   | { type: 'UPDATE_NAV_INFO', payload: Shape<NavInfo> }
   | {
       type: 'UPDATE_WINDOW_DIMENSIONS',
       payload: WindowDimensions,
     }
   | {
       type: 'UPDATE_WINDOW_ACTIVE',
       payload: boolean,
     }
   | {
       type: 'SET_DEVICE_ID',
       payload: string,
     }
   | { +type: 'SET_PRIMARY_IDENTITY_KEYS', payload: ?OLMIdentityKeys }
   | { +type: 'SET_NOTIFICATION_IDENTITY_KEYS', payload: ?OLMIdentityKeys }
   | { +type: 'SET_PICKLED_PRIMARY_ACCOUNT', payload: ?PickledOLMAccount }
   | { +type: 'SET_PICKLED_NOTIFICATION_ACCOUNT', payload: ?PickledOLMAccount };
 
 export function reducer(oldState: AppState | void, action: Action): AppState {
   invariant(oldState, 'should be set');
   let state = oldState;
 
   if (action.type === updateWindowDimensionsActionType) {
     return validateState(oldState, {
       ...state,
       windowDimensions: action.payload,
     });
   } else if (action.type === updateWindowActiveActionType) {
     return validateState(oldState, {
       ...state,
       windowActive: action.payload,
     });
   } else if (action.type === setNewSessionActionType) {
     if (
       invalidSessionDowngrade(
         oldState,
         action.payload.sessionChange.currentUserInfo,
         action.payload.preRequestUserState,
       )
     ) {
       return oldState;
     }
     state = {
       ...state,
       sessionID: action.payload.sessionChange.sessionID,
     };
   } else if (
     (action.type === logOutActionTypes.success &&
       invalidSessionDowngrade(
         oldState,
         action.payload.currentUserInfo,
         action.payload.preRequestUserState,
       )) ||
     (action.type === deleteAccountActionTypes.success &&
       invalidSessionDowngrade(
         oldState,
         action.payload.currentUserInfo,
         action.payload.preRequestUserState,
       ))
   ) {
     return oldState;
   }
 
   if (
     action.type !== updateNavInfoActionType &&
     action.type !== setDeviceIDActionType &&
     action.type !== setPrimaryIdentityKeys &&
     action.type !== setNotificationIdentityKeys &&
     action.type !== setPickledPrimaryAccount &&
     action.type !== setPickledNotificationAccount
   ) {
     const baseReducerResult = baseReducer(state, action);
     state = baseReducerResult.state;
 
     const {
       storeOperations: { draftStoreOperations, reportStoreOperations },
     } = baseReducerResult;
     if (draftStoreOperations.length > 0 || reportStoreOperations.length > 0) {
       (async () => {
         const isSupported = await databaseModule.isDatabaseSupported();
         if (!isSupported) {
           return;
         }
         const convertedReportStoreOperations =
           convertReportStoreOperationToClientDBReportStoreOperation(
             reportStoreOperations,
           );
         await databaseModule.schedule({
           type: workerRequestMessageTypes.PROCESS_STORE_OPERATIONS,
           storeOperations: {
             draftStoreOperations,
             reportStoreOperations: convertedReportStoreOperations,
           },
         });
       })();
     }
   }
 
   const communityPickerStore = reduceCommunityPickerStore(
     state.communityPickerStore,
     action,
   );
 
   state = {
     ...state,
     navInfo: reduceNavInfo(
       state.navInfo,
       action,
       state.threadStore.threadInfos,
     ),
     deviceID: reduceDeviceID(state.deviceID, action),
     cryptoStore: reduceCryptoStore(state.cryptoStore, action),
     communityPickerStore,
   };
 
   return validateState(oldState, state);
 }
 
 function validateState(oldState: AppState, state: AppState): AppState {
   if (
     (state.navInfo.activeChatThreadID &&
       !state.navInfo.pendingThread &&
       !state.threadStore.threadInfos[state.navInfo.activeChatThreadID]) ||
     (!state.navInfo.activeChatThreadID && isLoggedIn(state))
   ) {
     // Makes sure the active thread always exists
     state = {
       ...state,
       navInfo: {
         ...state.navInfo,
         activeChatThreadID: mostRecentlyReadThreadSelector(state),
       },
     };
   }
 
   const activeThread = activeThreadSelector(state);
   if (
     activeThread &&
     !state.navInfo.pendingThread &&
     state.threadStore.threadInfos[activeThread].currentUser.unread &&
     getVisibility().hidden()
   ) {
     console.warn(
       `thread ${activeThread} is active and unread, ` +
         'but visibilityjs reports the window is not visible',
     );
   }
   if (
     activeThread &&
     !state.navInfo.pendingThread &&
     state.threadStore.threadInfos[activeThread].currentUser.unread &&
     typeof document !== 'undefined' &&
     document &&
     'hasFocus' in document &&
     !document.hasFocus()
   ) {
     console.warn(
       `thread ${activeThread} is active and unread, ` +
         'but document.hasFocus() is false',
     );
   }
   if (
     activeThread &&
     !getVisibility().hidden() &&
     typeof document !== 'undefined' &&
     document &&
     'hasFocus' in document &&
     document.hasFocus() &&
     !state.navInfo.pendingThread &&
     state.threadStore.threadInfos[activeThread].currentUser.unread
   ) {
     // Makes sure a currently focused thread is never unread
     state = {
       ...state,
       threadStore: {
         ...state.threadStore,
         threadInfos: {
           ...state.threadStore.threadInfos,
           [activeThread]: {
             ...state.threadStore.threadInfos[activeThread],
             currentUser: {
               ...state.threadStore.threadInfos[activeThread].currentUser,
               unread: false,
             },
           },
         },
       },
     };
   }
 
   const oldActiveThread = activeThreadSelector(oldState);
   if (
     activeThread &&
     oldActiveThread !== activeThread &&
     state.messageStore.threads[activeThread]
   ) {
     // Update messageStore.threads[activeThread].lastNavigatedTo
     state = {
       ...state,
       messageStore: {
         ...state.messageStore,
         threads: {
           ...state.messageStore.threads,
           [activeThread]: {
             ...state.messageStore.threads[activeThread],
             lastNavigatedTo: Date.now(),
           },
         },
       },
     };
   }
 
   return state;
 }