diff --git a/native/chat/chat-item-height-measurer.react.js b/native/chat/chat-item-height-measurer.react.js
--- a/native/chat/chat-item-height-measurer.react.js
+++ b/native/chat/chat-item-height-measurer.react.js
@@ -155,7 +155,7 @@
 
   return (
     <MessageListContextProvider
-      threadID={threadInfo.id}
+      threadInfo={threadInfo}
       key={measurement.measurerID}
     >
       <NodeHeightMeasurer
diff --git a/native/chat/message-list-container.react.js b/native/chat/message-list-container.react.js
--- a/native/chat/message-list-container.react.js
+++ b/native/chat/message-list-container.react.js
@@ -322,7 +322,6 @@
       [setParams, existingThreadInfoFinder, addReply],
     );
 
-    const threadID = threadInfo.id;
     const messageListData = useMessageListData({
       searching: isSearching,
       userInfoInputArray,
@@ -338,7 +337,7 @@
     );
 
     return (
-      <MessageListContextProvider threadID={threadID}>
+      <MessageListContextProvider threadInfo={threadInfo}>
         <MessageListContainer
           {...props}
           usernameInputText={usernameInputText}
diff --git a/native/chat/message-list-types.js b/native/chat/message-list-types.js
--- a/native/chat/message-list-types.js
+++ b/native/chat/message-list-types.js
@@ -24,8 +24,8 @@
 const MessageListContext: React.Context<?MessageListContextType> =
   React.createContext<?MessageListContextType>();
 
-function useMessageListContext(threadID: ?string) {
-  const getTextMessageMarkdownRules = useTextMessageRulesFunc(threadID);
+function useMessageListContext(threadInfo: ThreadInfo) {
+  const getTextMessageMarkdownRules = useTextMessageRulesFunc(threadInfo);
   return React.useMemo(
     () => ({
       getTextMessageMarkdownRules,
@@ -36,10 +36,10 @@
 
 type Props = {
   +children: React.Node,
-  +threadID: ?string,
+  +threadInfo: ThreadInfo,
 };
 function MessageListContextProvider(props: Props): React.Node {
-  const context = useMessageListContext(props.threadID);
+  const context = useMessageListContext(props.threadInfo);
   return (
     <MessageListContext.Provider value={context}>
       {props.children}
diff --git a/native/chat/text-message-tooltip-button.react.js b/native/chat/text-message-tooltip-button.react.js
--- a/native/chat/text-message-tooltip-button.react.js
+++ b/native/chat/text-message-tooltip-button.react.js
@@ -75,8 +75,6 @@
     };
   }, [initialCoordinates.height, initialCoordinates.x, progress, windowWidth]);
 
-  const threadID = item.threadInfo.id;
-
   const messagePressResponderContext = React.useMemo(
     () => ({
       onPressMessage: navigation.goBackOnce,
@@ -164,7 +162,7 @@
   );
 
   return (
-    <MessageListContextProvider threadID={threadID}>
+    <MessageListContextProvider threadInfo={threadInfo}>
       <SidebarInputBarHeightMeasurer
         sourceMessage={item}
         onInputBarMeasured={onInputBarMeasured}
diff --git a/native/markdown/rules.react.js b/native/markdown/rules.react.js
--- a/native/markdown/rules.react.js
+++ b/native/markdown/rules.react.js
@@ -3,18 +3,15 @@
 import _memoize from 'lodash/memoize.js';
 import * as React from 'react';
 import { Text, View, Platform } from 'react-native';
-import { createSelector } from 'reselect';
 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 MarkdownLink from './markdown-link.react.js';
 import MarkdownParagraph from './markdown-paragraph.react.js';
 import MarkdownSpoiler from './markdown-spoiler.react.js';
 import { getMarkdownStyles } from './styles.js';
-import { useSelector } from '../redux/redux-utils.js';
 
 export type MarkdownRules = {
   +simpleMarkdownRules: SharedMarkdown.ParserRules,
@@ -355,27 +352,18 @@
 });
 
 function useTextMessageRulesFunc(
-  threadID: ?string,
+  threadInfo: ThreadInfo,
 ): (useDarkStyle: boolean) => MarkdownRules {
-  return useSelector(getTextMessageRulesFunction(threadID));
+  const { members } = threadInfo;
+  return React.useMemo(
+    () =>
+      _memoize<[boolean], MarkdownRules>((useDarkStyle: boolean) =>
+        textMessageRules(members, useDarkStyle),
+      ),
+    [members],
+  );
 }
 
-const getTextMessageRulesFunction = _memoize((threadID: ?string) =>
-  createSelector(
-    relativeMemberInfoSelectorForMembersOfThread(threadID),
-    (
-      threadMembers: $ReadOnlyArray<RelativeMemberInfo>,
-    ): (boolean => MarkdownRules) => {
-      if (!threadID) {
-        return fullMarkdownRules;
-      }
-      return _memoize<[boolean], MarkdownRules>((useDarkStyle: boolean) =>
-        textMessageRules(threadMembers, useDarkStyle),
-      );
-    },
-  ),
-);
-
 function textMessageRules(
   members: $ReadOnlyArray<RelativeMemberInfo>,
   useDarkStyle: boolean,