diff --git a/web/chat/chat-message-list.react.js b/web/chat/chat-message-list.react.js
index dd7d49266..2ac190be6 100644
--- a/web/chat/chat-message-list.react.js
+++ b/web/chat/chat-message-list.react.js
@@ -1,343 +1,343 @@
 // @flow
 
 import classNames from 'classnames';
 import { detect as detectBrowser } from 'detect-browser';
 import invariant from 'invariant';
 import * as React from 'react';
 
 import {
   fetchMessagesBeforeCursorActionTypes,
   fetchMessagesBeforeCursor,
   fetchMostRecentMessagesActionTypes,
   fetchMostRecentMessages,
 } from 'lib/actions/message-actions.js';
 import { registerFetchKey } from 'lib/reducers/loading-reducer.js';
 import {
   type ChatMessageItem,
   useMessageListData,
 } from 'lib/selectors/chat-selectors.js';
 import { messageKey } from 'lib/shared/message-utils.js';
 import { threadIsPending } from 'lib/shared/thread-utils.js';
 import type { FetchMessageInfosPayload } from 'lib/types/message-types.js';
 import { type ThreadInfo, threadTypes } from 'lib/types/thread-types.js';
 import {
   type DispatchActionPromise,
   useServerCall,
   useDispatchActionPromise,
 } from 'lib/utils/action-utils.js';
 
 import css from './chat-message-list.css';
 import { MessageListContext } from './message-list-types.js';
 import Message from './message.react.js';
 import RelationshipPrompt from './relationship-prompt/relationship-prompt.js';
 import { useTooltipContext } from './tooltip-provider.js';
 import { type InputState, InputStateContext } from '../input/input-state.js';
 import LoadingIndicator from '../loading-indicator.react.js';
 import { useTextMessageRulesFunc } from '../markdown/rules.react.js';
 import { useSelector } from '../redux/redux-utils.js';
 
 const browser = detectBrowser();
 const supportsReverseFlex =
   !browser || browser.name !== 'firefox' || parseInt(browser.version) >= 81;
 
 type BaseProps = {
   +threadInfo: ThreadInfo,
 };
 
 type Props = {
   ...BaseProps,
   // Redux state
   +activeChatThreadID: ?string,
   +messageListData: ?$ReadOnlyArray<ChatMessageItem>,
   +startReached: boolean,
   // Redux dispatch functions
   +dispatchActionPromise: DispatchActionPromise,
   // async functions that hit server APIs
   +fetchMessagesBeforeCursor: (
     threadID: string,
     beforeMessageID: string,
   ) => Promise<FetchMessageInfosPayload>,
   +fetchMostRecentMessages: (
     threadID: string,
   ) => Promise<FetchMessageInfosPayload>,
   // withInputState
   +inputState: ?InputState,
   +clearTooltip: () => mixed,
 };
 type Snapshot = {
   +scrollTop: number,
   +scrollHeight: number,
 };
 class ChatMessageList extends React.PureComponent<Props> {
   container: ?HTMLDivElement;
   messageContainer: ?HTMLDivElement;
   loadingFromScroll = false;
 
   componentDidMount() {
     this.scrollToBottom();
   }
 
   getSnapshotBeforeUpdate(prevProps: Props) {
     if (
       ChatMessageList.hasNewMessage(this.props, prevProps) &&
       this.messageContainer
     ) {
       const { scrollTop, scrollHeight } = this.messageContainer;
       return { scrollTop, scrollHeight };
     }
     return null;
   }
 
   static hasNewMessage(props: Props, prevProps: Props) {
     const { messageListData } = props;
     if (!messageListData || messageListData.length === 0) {
       return false;
     }
     const prevMessageListData = prevProps.messageListData;
     if (!prevMessageListData || prevMessageListData.length === 0) {
       return true;
     }
     return (
       ChatMessageList.keyExtractor(prevMessageListData[0]) !==
       ChatMessageList.keyExtractor(messageListData[0])
     );
   }
 
   componentDidUpdate(prevProps: Props, prevState, snapshot: ?Snapshot) {
     const { messageListData } = this.props;
     const prevMessageListData = prevProps.messageListData;
 
     if (
       this.loadingFromScroll &&
       messageListData &&
       (!prevMessageListData ||
         messageListData.length > prevMessageListData.length ||
         this.props.startReached)
     ) {
       this.loadingFromScroll = false;
     }
 
     const { messageContainer } = this;
     if (messageContainer && prevMessageListData !== messageListData) {
       this.onScroll();
     }
 
     // We'll scroll to the bottom if the user was already scrolled to the bottom
     // before the new message, or if the new message was composed locally
     const hasNewMessage = ChatMessageList.hasNewMessage(this.props, prevProps);
     if (
       this.props.activeChatThreadID !== prevProps.activeChatThreadID ||
       (hasNewMessage &&
         messageListData &&
         messageListData[0].itemType === 'message' &&
         messageListData[0].messageInfo.localID) ||
       (hasNewMessage && snapshot && Math.abs(snapshot.scrollTop) <= 1)
     ) {
       this.scrollToBottom();
     } else if (hasNewMessage && messageContainer && snapshot) {
       const { scrollTop, scrollHeight } = messageContainer;
       if (
         scrollHeight > snapshot.scrollHeight &&
         scrollTop === snapshot.scrollTop
       ) {
         const newHeight = scrollHeight - snapshot.scrollHeight;
         const newScrollTop = Math.abs(scrollTop) + newHeight;
         if (supportsReverseFlex) {
           messageContainer.scrollTop = -1 * newScrollTop;
         } else {
           messageContainer.scrollTop = newScrollTop;
         }
       }
     }
   }
 
   scrollToBottom() {
     if (this.messageContainer) {
       this.messageContainer.scrollTop = 0;
     }
   }
 
   static keyExtractor(item: ChatMessageItem) {
     if (item.itemType === 'loader') {
       return 'loader';
     }
     return messageKey(item.messageInfo);
   }
 
   renderItem = item => {
     if (item.itemType === 'loader') {
       return (
         <div key="loader" className={css.loading}>
           <LoadingIndicator status="loading" size="large" color="white" />
         </div>
       );
     }
     const { threadInfo } = this.props;
     invariant(threadInfo, 'ThreadInfo should be set if messageListData is');
     return (
       <Message
         item={item}
         threadInfo={threadInfo}
         key={ChatMessageList.keyExtractor(item)}
       />
     );
   };
 
   render() {
     const { messageListData, threadInfo, inputState } = this.props;
     if (!messageListData) {
       return <div className={css.container} />;
     }
     invariant(inputState, 'InputState should be set');
     const messages = messageListData.map(this.renderItem);
 
     let relationshipPrompt = null;
     if (threadInfo.type === threadTypes.PERSONAL) {
       relationshipPrompt = <RelationshipPrompt threadInfo={threadInfo} />;
     }
 
     const messageContainerStyle = classNames({
       [css.messageContainer]: true,
       [css.mirroredMessageContainer]: !supportsReverseFlex,
     });
     return (
       <div className={css.outerMessageContainer}>
         {relationshipPrompt}
         <div className={messageContainerStyle} ref={this.messageContainerRef}>
           {messages}
         </div>
       </div>
     );
   }
 
   messageContainerRef = (messageContainer: ?HTMLDivElement) => {
     this.messageContainer = messageContainer;
     // In case we already have all the most recent messages,
     // but they're not enough
     this.possiblyLoadMoreMessages();
     if (messageContainer) {
       messageContainer.addEventListener('scroll', this.onScroll);
     }
   };
 
   onScroll = () => {
     if (!this.messageContainer) {
       return;
     }
     this.props.clearTooltip();
     this.possiblyLoadMoreMessages();
   };
 
   possiblyLoadMoreMessages() {
     if (!this.messageContainer) {
       return;
     }
 
     const { scrollTop, scrollHeight, clientHeight } = this.messageContainer;
     if (
       this.props.startReached ||
       Math.abs(scrollTop) + clientHeight + 55 < scrollHeight
     ) {
       return;
     }
 
     if (this.loadingFromScroll) {
       return;
     }
     this.loadingFromScroll = true;
 
     const threadID = this.props.activeChatThreadID;
     invariant(threadID, 'should be set');
 
     const oldestMessageServerID = this.oldestMessageServerID();
     if (oldestMessageServerID) {
       this.props.dispatchActionPromise(
         fetchMessagesBeforeCursorActionTypes,
         this.props.fetchMessagesBeforeCursor(threadID, oldestMessageServerID),
       );
     } else {
       this.props.dispatchActionPromise(
         fetchMostRecentMessagesActionTypes,
         this.props.fetchMostRecentMessages(threadID),
       );
     }
   }
 
   oldestMessageServerID(): ?string {
     const data = this.props.messageListData;
     invariant(data, 'should be set');
     for (let i = data.length - 1; i >= 0; i--) {
       if (data[i].itemType === 'message' && data[i].messageInfo.id) {
         return data[i].messageInfo.id;
       }
     }
     return null;
   }
 }
 
 registerFetchKey(fetchMessagesBeforeCursorActionTypes);
 registerFetchKey(fetchMostRecentMessagesActionTypes);
 const ConnectedChatMessageList: React.ComponentType<BaseProps> =
   React.memo<BaseProps>(function ConnectedChatMessageList(
     props: BaseProps,
   ): React.Node {
     const { threadInfo } = props;
     const messageListData = useMessageListData({
       threadInfo,
       searching: false,
       userInfoInputArray: [],
     });
 
     const startReached = !!useSelector(state => {
       const activeID = threadInfo.id;
       if (!activeID) {
         return null;
       }
 
       if (threadIsPending(activeID)) {
         return true;
       }
 
       const threadMessageInfo = state.messageStore.threads[activeID];
       if (!threadMessageInfo) {
         return null;
       }
       return threadMessageInfo.startReached;
     });
 
     const dispatchActionPromise = useDispatchActionPromise();
     const callFetchMessagesBeforeCursor = useServerCall(
       fetchMessagesBeforeCursor,
     );
     const callFetchMostRecentMessages = useServerCall(fetchMostRecentMessages);
 
     const inputState = React.useContext(InputStateContext);
 
     const { clearTooltip } = useTooltipContext();
 
-    const getTextMessageMarkdownRules = useTextMessageRulesFunc(threadInfo.id);
+    const getTextMessageMarkdownRules = useTextMessageRulesFunc(threadInfo);
     const messageListContext = React.useMemo(() => {
       if (!getTextMessageMarkdownRules) {
         return undefined;
       }
       return { getTextMessageMarkdownRules };
     }, [getTextMessageMarkdownRules]);
 
     return (
       <MessageListContext.Provider value={messageListContext}>
         <ChatMessageList
           activeChatThreadID={threadInfo.id}
           threadInfo={threadInfo}
           messageListData={messageListData}
           startReached={startReached}
           inputState={inputState}
           dispatchActionPromise={dispatchActionPromise}
           fetchMessagesBeforeCursor={callFetchMessagesBeforeCursor}
           fetchMostRecentMessages={callFetchMostRecentMessages}
           clearTooltip={clearTooltip}
         />
       </MessageListContext.Provider>
     );
   });
 
 export default ConnectedChatMessageList;
diff --git a/web/markdown/rules.react.js b/web/markdown/rules.react.js
index 8231e986e..c4c51fcc0 100644
--- a/web/markdown/rules.react.js
+++ b/web/markdown/rules.react.js
@@ -1,213 +1,208 @@
 // @flow
 
 import _memoize from 'lodash/memoize.js';
 import * as React from 'react';
 import * as SimpleMarkdown from 'simple-markdown';
 
-import { relativeMemberInfoSelectorForMembersOfThread } from 'lib/selectors/user-selectors.js';
 import * as SharedMarkdown from 'lib/shared/markdown.js';
-import type { RelativeMemberInfo } from 'lib/types/thread-types.js';
+import type { RelativeMemberInfo, ThreadInfo } from 'lib/types/thread-types.js';
 
 import MarkdownSpoiler from './markdown-spoiler.react.js';
-import { useSelector } from '../redux/redux-utils.js';
 
 export type MarkdownRules = {
   +simpleMarkdownRules: SharedMarkdown.ParserRules,
   +useDarkStyle: boolean,
 };
 
 const linkRules: boolean => MarkdownRules = _memoize(useDarkStyle => {
   const simpleMarkdownRules = {
     // We are using default simple-markdown rules
     // For more details, look at native/markdown/rules.react
     link: {
       ...SimpleMarkdown.defaultRules.link,
       match: () => null,
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => (
         <a
           href={SimpleMarkdown.sanitizeUrl(node.target)}
           key={state.key}
           title={node.title}
           target="_blank"
           rel="noopener noreferrer"
         >
           {output(node.content, state)}
         </a>
       ),
     },
     paragraph: {
       ...SimpleMarkdown.defaultRules.paragraph,
       match: SimpleMarkdown.blockRegex(SharedMarkdown.paragraphRegex),
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => (
         <React.Fragment key={state.key}>
           {output(node.content, state)}
         </React.Fragment>
       ),
     },
     text: SimpleMarkdown.defaultRules.text,
     url: {
       ...SimpleMarkdown.defaultRules.url,
       match: SimpleMarkdown.inlineRegex(SharedMarkdown.urlRegex),
     },
   };
   return {
     simpleMarkdownRules: simpleMarkdownRules,
     useDarkStyle,
   };
 });
 
 const markdownRules: boolean => MarkdownRules = _memoize(useDarkStyle => {
   const linkMarkdownRules = linkRules(useDarkStyle);
 
   const simpleMarkdownRules = {
     ...linkMarkdownRules.simpleMarkdownRules,
     autolink: SimpleMarkdown.defaultRules.autolink,
     link: {
       ...linkMarkdownRules.simpleMarkdownRules.link,
       match: SimpleMarkdown.defaultRules.link.match,
     },
     blockQuote: {
       ...SimpleMarkdown.defaultRules.blockQuote,
       // match end of blockQuote by either \n\n or end of string
       match: SharedMarkdown.matchBlockQuote(SharedMarkdown.blockQuoteRegex),
       parse: SharedMarkdown.parseBlockQuote,
     },
     spoiler: {
       order: SimpleMarkdown.defaultRules.paragraph.order - 1,
       match: SimpleMarkdown.inlineRegex(SharedMarkdown.spoilerRegex),
       parse(
         capture: SharedMarkdown.Capture,
         parse: SharedMarkdown.Parser,
         state: SharedMarkdown.State,
       ) {
         const content = capture[1];
         return {
           content: SimpleMarkdown.parseInline(parse, content, state),
         };
       },
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => (
         <MarkdownSpoiler key={state.key} text={output(node.content, state)} />
       ),
     },
     inlineCode: SimpleMarkdown.defaultRules.inlineCode,
     em: SimpleMarkdown.defaultRules.em,
     strong: SimpleMarkdown.defaultRules.strong,
     del: SimpleMarkdown.defaultRules.del,
     u: SimpleMarkdown.defaultRules.u,
     heading: {
       ...SimpleMarkdown.defaultRules.heading,
       match: SimpleMarkdown.blockRegex(SharedMarkdown.headingRegex),
     },
     mailto: SimpleMarkdown.defaultRules.mailto,
     codeBlock: {
       ...SimpleMarkdown.defaultRules.codeBlock,
       match: SimpleMarkdown.blockRegex(SharedMarkdown.codeBlockRegex),
       parse: (capture: SharedMarkdown.Capture) => ({
         content: capture[0].replace(/^ {4}/gm, ''),
       }),
     },
     fence: {
       ...SimpleMarkdown.defaultRules.fence,
       match: SimpleMarkdown.blockRegex(SharedMarkdown.fenceRegex),
       parse: (capture: SharedMarkdown.Capture) => ({
         type: 'codeBlock',
         content: capture[2],
       }),
     },
     json: {
       order: SimpleMarkdown.defaultRules.paragraph.order - 1,
       match: (source: string, state: SharedMarkdown.State) => {
         if (state.inline) {
           return null;
         }
         return SharedMarkdown.jsonMatch(source);
       },
       parse: (capture: SharedMarkdown.Capture) => {
         const jsonCapture: SharedMarkdown.JSONCapture = (capture: any);
         return {
           type: 'codeBlock',
           content: SharedMarkdown.jsonPrint(jsonCapture),
         };
       },
     },
     list: {
       ...SimpleMarkdown.defaultRules.list,
       match: SharedMarkdown.matchList,
       parse: SharedMarkdown.parseList,
     },
     escape: SimpleMarkdown.defaultRules.escape,
   };
   return {
     ...linkMarkdownRules,
     simpleMarkdownRules,
     useDarkStyle,
   };
 });
 
 function useTextMessageRulesFunc(
-  threadID: ?string,
-): ?(boolean) => MarkdownRules {
-  const threadMembers = useSelector(
-    relativeMemberInfoSelectorForMembersOfThread(threadID),
+  threadInfo: ThreadInfo,
+): boolean => MarkdownRules {
+  const { members } = threadInfo;
+  return React.useMemo(
+    () =>
+      _memoize<[boolean], MarkdownRules>((useDarkStyle: boolean) =>
+        textMessageRules(members, useDarkStyle),
+      ),
+    [members],
   );
-  return React.useMemo(() => {
-    if (!threadMembers) {
-      return undefined;
-    }
-    return _memoize<[boolean], MarkdownRules>((useDarkStyle: boolean) =>
-      textMessageRules(threadMembers, useDarkStyle),
-    );
-  }, [threadMembers]);
 }
 
 function textMessageRules(
   members: $ReadOnlyArray<RelativeMemberInfo>,
   useDarkStyle: boolean,
 ): MarkdownRules {
   const baseRules = markdownRules(useDarkStyle);
   return {
     ...baseRules,
     simpleMarkdownRules: {
       ...baseRules.simpleMarkdownRules,
       mention: {
         ...SimpleMarkdown.defaultRules.strong,
         match: SharedMarkdown.matchMentions(members),
         parse: (capture: SharedMarkdown.Capture) => ({
           content: capture[0],
         }),
         // eslint-disable-next-line react/display-name
         react: (
           node: SharedMarkdown.SingleASTNode,
           output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
           state: SharedMarkdown.State,
         ) => <strong key={state.key}>{node.content}</strong>,
       },
     },
   };
 }
 
 let defaultTextMessageRules = null;
 
 function getDefaultTextMessageRules(): MarkdownRules {
   if (!defaultTextMessageRules) {
     defaultTextMessageRules = textMessageRules([], false);
   }
   return defaultTextMessageRules;
 }
 
 export { linkRules, useTextMessageRulesFunc, getDefaultTextMessageRules };