diff --git a/native/redux/persist.js b/native/redux/persist.js
index e3cc7a2aa..b06617b67 100644
--- a/native/redux/persist.js
+++ b/native/redux/persist.js
@@ -1,512 +1,528 @@
 // @flow
 
 import AsyncStorage from '@react-native-async-storage/async-storage';
 import invariant from 'invariant';
 import { Platform } from 'react-native';
 import Orientation from 'react-native-orientation-locker';
 import { createMigrate, createTransform } from 'redux-persist';
 import type { Transform } from 'redux-persist/es/types';
 
 import { highestLocalIDSelector } from 'lib/selectors/local-id-selectors';
 import { inconsistencyResponsesToReports } from 'lib/shared/report-utils';
 import { getContainingThreadID, getCommunity } from 'lib/shared/thread-utils';
 import { unshimMessageStore, unshimFunc } from 'lib/shared/unshim-utils';
 import { defaultEnabledApps } from 'lib/types/enabled-apps';
 import { defaultCalendarFilters } from 'lib/types/filter-types';
 import {
   type LocalMessageInfo,
   type MessageStore,
   messageTypes,
   type ClientDBMessageStoreOperation,
 } from 'lib/types/message-types';
 import type { ClientDBMessageInfo } from 'lib/types/message-types';
 import { defaultConnectionInfo } from 'lib/types/socket-types';
 import {
   translateClientDBMessageInfoToRawMessageInfo,
   translateRawMessageInfoToClientDBMessageInfo,
 } from 'lib/utils/message-ops-utils';
 import { convertThreadStoreOperationsToClientDBOperations } from 'lib/utils/thread-ops-utils';
 
 import { commCoreModule } from '../native-modules';
 import { defaultNotifPermissionAlertInfo } from '../push/alerts';
 import { defaultDeviceCameraInfo } from '../types/camera';
 import { defaultGlobalThemeInfo } from '../types/themes';
 import { isTaskCancelledError } from '../utils/error-handling';
 import { migrateThreadStoreForEditThreadPermissions } from './edit-thread-permission-migration';
 import type { AppState } from './state-types';
 
 const migrations = {
   [1]: (state: AppState) => ({
     ...state,
     notifPermissionAlertInfo: defaultNotifPermissionAlertInfo,
   }),
   [2]: (state: AppState) => ({
     ...state,
     messageSentFromRoute: [],
   }),
   [3]: state => ({
     currentUserInfo: state.currentUserInfo,
     entryStore: state.entryStore,
     threadInfos: state.threadInfos,
     userInfos: state.userInfos,
     messageStore: {
       ...state.messageStore,
       currentAsOf: state.currentAsOf,
     },
     updatesCurrentAsOf: state.currentAsOf,
     cookie: state.cookie,
     deviceToken: state.deviceToken,
     urlPrefix: state.urlPrefix,
     customServer: state.customServer,
     threadIDsToNotifIDs: state.threadIDsToNotifIDs,
     notifPermissionAlertInfo: state.notifPermissionAlertInfo,
     messageSentFromRoute: state.messageSentFromRoute,
     _persist: state._persist,
   }),
   [4]: (state: AppState) => ({
     ...state,
     pingTimestamps: undefined,
     activeServerRequests: undefined,
   }),
   [5]: (state: AppState) => ({
     ...state,
     calendarFilters: defaultCalendarFilters,
   }),
   [6]: state => ({
     ...state,
     threadInfos: undefined,
     threadStore: {
       threadInfos: state.threadInfos,
       inconsistencyResponses: [],
     },
   }),
   [7]: state => ({
     ...state,
     lastUserInteraction: undefined,
     sessionID: undefined,
     entryStore: {
       ...state.entryStore,
       inconsistencyResponses: [],
     },
   }),
   [8]: (state: AppState) => ({
     ...state,
     pingTimestamps: undefined,
     activeServerRequests: undefined,
     connection: defaultConnectionInfo(Platform.OS),
     watchedThreadIDs: [],
     entryStore: {
       ...state.entryStore,
       actualizedCalendarQuery: undefined,
     },
   }),
   [9]: (state: AppState) => ({
     ...state,
     connection: {
       ...state.connection,
       lateResponses: [],
     },
   }),
   [10]: (state: AppState) => ({
     ...state,
     nextLocalID: highestLocalIDSelector(state) + 1,
     connection: {
       ...state.connection,
       showDisconnectedBar: false,
     },
     messageStore: {
       ...state.messageStore,
       local: {},
     },
   }),
   [11]: (state: AppState) => ({
     ...state,
     messageStore: unshimMessageStore(state.messageStore, [messageTypes.IMAGES]),
   }),
   [12]: (state: AppState) => ({
     ...state,
     globalThemeInfo: defaultGlobalThemeInfo,
   }),
   [13]: (state: AppState) => ({
     ...state,
     deviceCameraInfo: defaultDeviceCameraInfo,
     deviceOrientation: Orientation.getInitialOrientation(),
   }),
   [14]: (state: AppState) => state,
   [15]: state => ({
     ...state,
     threadStore: {
       ...state.threadStore,
       inconsistencyReports: inconsistencyResponsesToReports(
         state.threadStore.inconsistencyResponses,
       ),
       inconsistencyResponses: undefined,
     },
     entryStore: {
       ...state.entryStore,
       inconsistencyReports: inconsistencyResponsesToReports(
         state.entryStore.inconsistencyResponses,
       ),
       inconsistencyResponses: undefined,
     },
     queuedReports: [],
   }),
   [16]: state => {
     const result = {
       ...state,
       messageSentFromRoute: undefined,
       dataLoaded: !!state.currentUserInfo && !state.currentUserInfo.anonymous,
     };
     if (state.navInfo) {
       result.navInfo = {
         ...state.navInfo,
         navigationState: undefined,
       };
     }
     return result;
   },
   [17]: state => ({
     ...state,
     userInfos: undefined,
     userStore: {
       userInfos: state.userInfos,
       inconsistencyResponses: [],
     },
   }),
   [18]: state => ({
     ...state,
     userStore: {
       userInfos: state.userStore.userInfos,
       inconsistencyReports: [],
     },
   }),
   [19]: state => {
     const threadInfos = {};
     for (const threadID in state.threadStore.threadInfos) {
       const threadInfo = state.threadStore.threadInfos[threadID];
       const { visibilityRules, ...rest } = threadInfo;
       threadInfos[threadID] = rest;
     }
     return {
       ...state,
       threadStore: {
         ...state.threadStore,
         threadInfos,
       },
     };
   },
   [20]: (state: AppState) => ({
     ...state,
     messageStore: unshimMessageStore(state.messageStore, [
       messageTypes.UPDATE_RELATIONSHIP,
     ]),
   }),
   [21]: (state: AppState) => ({
     ...state,
     messageStore: unshimMessageStore(state.messageStore, [
       messageTypes.CREATE_SIDEBAR,
       messageTypes.SIDEBAR_SOURCE,
     ]),
   }),
   [22]: state => {
     for (const key in state.drafts) {
       const value = state.drafts[key];
       try {
         commCoreModule.updateDraft(key, value);
       } catch (e) {
         if (!isTaskCancelledError(e)) {
           throw e;
         }
       }
     }
     return {
       ...state,
       drafts: undefined,
     };
   },
   [23]: state => ({
     ...state,
     globalThemeInfo: defaultGlobalThemeInfo,
   }),
   [24]: state => ({
     ...state,
     enabledApps: defaultEnabledApps,
   }),
   [25]: state => ({
     ...state,
     crashReportsEnabled: __DEV__,
   }),
   [26]: state => {
     const { currentUserInfo } = state;
     if (currentUserInfo.anonymous) {
       return state;
     }
     return {
       ...state,
       crashReportsEnabled: undefined,
       currentUserInfo: {
         id: currentUserInfo.id,
         username: currentUserInfo.username,
       },
       enabledReports: {
         crashReports: __DEV__,
         inconsistencyReports: __DEV__,
         mediaReports: __DEV__,
       },
     };
   },
   [27]: state => ({
     ...state,
     queuedReports: undefined,
     enabledReports: undefined,
     threadStore: {
       ...state.threadStore,
       inconsistencyReports: undefined,
     },
     entryStore: {
       ...state.entryStore,
       inconsistencyReports: undefined,
     },
     reportStore: {
       enabledReports: {
         crashReports: __DEV__,
         inconsistencyReports: __DEV__,
         mediaReports: __DEV__,
       },
       queuedReports: [
         ...state.entryStore.inconsistencyReports,
         ...state.threadStore.inconsistencyReports,
         ...state.queuedReports,
       ],
     },
   }),
   [28]: state => {
     const threadParentToChildren = {};
     for (const threadID in state.threadStore.threadInfos) {
       const threadInfo = state.threadStore.threadInfos[threadID];
       const parentThreadInfo = threadInfo.parentThreadID
         ? state.threadStore.threadInfos[threadInfo.parentThreadID]
         : null;
       const parentIndex = parentThreadInfo ? parentThreadInfo.id : '-1';
       if (!threadParentToChildren[parentIndex]) {
         threadParentToChildren[parentIndex] = [];
       }
       threadParentToChildren[parentIndex].push(threadID);
     }
 
     const rootIDs = threadParentToChildren['-1'];
     if (!rootIDs) {
       // This should never happen, but if it somehow does we'll let the state
       // check mechanism resolve it...
       return state;
     }
 
     const threadInfos = {};
     const stack = [...rootIDs];
     while (stack.length > 0) {
       const threadID = stack.shift();
       const threadInfo = state.threadStore.threadInfos[threadID];
       const parentThreadInfo = threadInfo.parentThreadID
         ? threadInfos[threadInfo.parentThreadID]
         : null;
       threadInfos[threadID] = {
         ...threadInfo,
         containingThreadID: getContainingThreadID(
           parentThreadInfo,
           threadInfo.type,
         ),
         community: getCommunity(parentThreadInfo),
       };
       const children = threadParentToChildren[threadID];
       if (children) {
         stack.push(...children);
       }
     }
     return { ...state, threadStore: { ...state.threadStore, threadInfos } };
   },
   [29]: (state: AppState) => {
     const updatedThreadInfos = migrateThreadStoreForEditThreadPermissions(
       state.threadStore.threadInfos,
     );
 
     return {
       ...state,
       threadStore: {
         ...state.threadStore,
         threadInfos: updatedThreadInfos,
       },
     };
   },
   [30]: (state: AppState) => {
     const threadInfos = state.threadStore.threadInfos;
     const operations = [
       {
         type: 'remove_all',
       },
       ...Object.keys(threadInfos).map((id: string) => ({
         type: 'replace',
         payload: { id, threadInfo: threadInfos[id] },
       })),
     ];
     try {
       commCoreModule.processThreadStoreOperationsSync(
         convertThreadStoreOperationsToClientDBOperations(operations),
       );
     } catch (exception) {
       console.log(exception);
       if (isTaskCancelledError(exception)) {
         return state;
       }
       return { ...state, cookie: null };
     }
     return state;
   },
   [31]: (state: AppState) => {
     const messages = state.messageStore.messages;
     const operations: $ReadOnlyArray<ClientDBMessageStoreOperation> = [
       {
         type: 'remove_all',
       },
       ...Object.keys(messages).map((id: string) => ({
         type: 'replace',
         payload: translateRawMessageInfoToClientDBMessageInfo(messages[id]),
       })),
     ];
     try {
       commCoreModule.processMessageStoreOperationsSync(operations);
     } catch (exception) {
       console.log(exception);
       if (isTaskCancelledError(exception)) {
         return state;
       }
       return { ...state, cookie: null };
     }
     return state;
   },
   [32]: (state: AppState) => {
     // 1. Get messages from SQLite `messages` table.
     const clientDBMessageInfos = commCoreModule.getAllMessagesSync();
 
     // 2. Translate `ClientDBMessageInfo`s to `RawMessageInfo`s.
     const rawMessageInfos = clientDBMessageInfos.map(
       translateClientDBMessageInfoToRawMessageInfo,
     );
 
     // 3. "Unshim" translated `RawMessageInfo`s.
     const unshimmedRawMessageInfos = rawMessageInfos.map(messageInfo =>
       unshimFunc(messageInfo, new Set([messageTypes.MULTIMEDIA])),
     );
 
     // 4. Translate unshimmed `RawMessageInfo`s back to `ClientDBMessageInfo`s.
     const unshimmedClientDBMessageInfos = unshimmedRawMessageInfos.map(
       translateRawMessageInfoToClientDBMessageInfo,
     );
 
     // 5. Construct `ClientDBMessageStoreOperation`s to clear SQLite `messages`
     //    table and repopulate with unshimmed `ClientDBMessageInfo`s.
     const operations: $ReadOnlyArray<ClientDBMessageStoreOperation> = [
       {
         type: 'remove_all',
       },
       ...unshimmedClientDBMessageInfos.map((message: ClientDBMessageInfo) => ({
         type: 'replace',
         payload: message,
       })),
     ];
 
     // 6. Try processing `ClientDBMessageStoreOperation`s and log out if
     //    `processMessageStoreOperationsSync(...)` throws an exception.
     try {
       commCoreModule.processMessageStoreOperationsSync(operations);
     } catch (exception) {
       console.log(exception);
       return { ...state, cookie: null };
     }
 
     return state;
   },
 };
 
 // After migration 31, we'll no longer want to persist `messageStore.messages`
 // via redux-persist. However, we DO want to continue persisting everything in
 // `messageStore` EXCEPT for `messages`. The `blacklist` property in
 // `persistConfig` allows us to specify top-level keys that shouldn't be
 // persisted. However, we aren't able to specify nested keys in `blacklist`.
 // As a result, if we want to prevent nested keys from being persisted we'll
 // need to use `createTransform(...)` to specify an `inbound` function that
 // allows us to modify the `state` object before it's passed through
 // `JSON.stringify(...)` and written to disk. We specify the keys for which
 // this transformation should be executed in the `whitelist` property of the
 // `config` object that's passed to `createTransform(...)`.
 // eslint-disable-next-line no-unused-vars
 type PersistedThreadMessageInfo = {
   +startReached: boolean,
   +lastNavigatedTo: number,
   +lastPruned: number,
 };
 type PersistedMessageStore = {
   +local: { +[id: string]: LocalMessageInfo },
   +currentAsOf: number,
   +threads: { +[threadID: string]: PersistedThreadMessageInfo },
 };
 
 const messageStoreMessagesBlocklistTransform: Transform = createTransform(
   (state: MessageStore): PersistedMessageStore => {
     const { messages, threads, ...messageStoreSansMessages } = state;
     // We also do not want to persist `messageStore.threads[ID].messageIDs`
     // because they can be deterministically computed based on messages we have
     // from SQLite
     const threadsToPersist = {};
     for (const threadID in threads) {
       const { messageIDs, ...threadsData } = threads[threadID];
       threadsToPersist[threadID] = threadsData;
     }
     return { ...messageStoreSansMessages, threads: threadsToPersist };
   },
-  (state: PersistedMessageStore): MessageStore => {
+  (state: MessageStore): MessageStore => {
     const { threads: persistedThreads, ...messageStore } = state;
     const threads = {};
     for (const threadID in persistedThreads) {
       threads[threadID] = { ...persistedThreads[threadID], messageIDs: [] };
     }
-    return { ...messageStore, threads, messages: {} };
+    // We typically expect `messageStore.messages` to be `undefined` because
+    // messages are persisted in the SQLite `messages` table rather than via
+    // `redux-persist`. In this case we want to set `messageStore.messages`
+    // to {} so we don't run into issues with `messageStore.messages` being
+    // `undefined` (https://phab.comm.dev/D5545).
+    //
+    // However, in the case that a user is upgrading from a client where
+    // `persistConfig.version` < 31, we expect `messageStore.messages` to
+    // contain messages stored via `redux-persist` that we need in order
+    // to correctly populate the SQLite `messages` table in migration 31
+    // (https://phab.comm.dev/D2600).
+    //
+    // However, because `messageStoreMessagesBlocklistTransform` modifies
+    // `messageStore` before migrations are run, we need to make sure we aren't
+    // inadvertently clearing `messageStore.messages` (by setting to {}) before
+    // messages are stored in SQLite (https://linear.app/comm/issue/ENG-2377).
+    return { ...messageStore, threads, messages: messageStore.messages ?? {} };
   },
   { whitelist: ['messageStore'] },
 );
 
 const persistConfig = {
   key: 'root',
   storage: AsyncStorage,
   blacklist: [
     'loadingStatuses',
     'lifecycleState',
     'dimensions',
     'draftStore',
     'connectivity',
     'deviceOrientation',
     'frozen',
     'threadStore',
     'storeLoaded',
   ],
   debug: __DEV__,
   version: 32,
   transforms: [messageStoreMessagesBlocklistTransform],
   migrate: (createMigrate(migrations, { debug: __DEV__ }): any),
   timeout: ((__DEV__ ? 0 : undefined): number | void),
 };
 
 const codeVersion: number = commCoreModule.getCodeVersion();
 
 // This local exists to avoid a circular dependency where redux-setup needs to
 // import all the navigation and screen stuff, but some of those screens want to
 // access the persistor to purge its state.
 let storedPersistor = null;
 function setPersistor(persistor: *) {
   storedPersistor = persistor;
 }
 function getPersistor(): empty {
   invariant(storedPersistor, 'should be set');
   return storedPersistor;
 }
 
 export { persistConfig, codeVersion, setPersistor, getPersistor };