diff --git a/lib/shared/mention-utils.js b/lib/shared/mention-utils.js
--- a/lib/shared/mention-utils.js
+++ b/lib/shared/mention-utils.js
@@ -4,7 +4,6 @@
 
 import { markdownUserMentionRegexString } from './account-utils.js';
 import SentencePrefixSearchIndex from './sentence-prefix-search-index.js';
-import { threadOtherMembers } from './thread-utils.js';
 import { stringForUserExplicit } from './user-utils.js';
 import { useENSNames } from '../hooks/ens-cache.js';
 import { useUserSearchIndex } from '../selectors/nav-selectors.js';
@@ -107,7 +106,6 @@
 const useENSNamesOptions = { allAtOnce: true };
 function useMentionTypeaheadUserSuggestions(
   threadMembers: $ReadOnlyArray<RelativeMemberInfo>,
-  viewerID: ?string,
   typeaheadMatchedStrings: ?TypeaheadMatchedStrings,
 ): $ReadOnlyArray<MentionTypeaheadUserSuggestionItem> {
   const userSearchIndex = useUserSearchIndex(threadMembers);
@@ -121,7 +119,7 @@
     }
 
     const userIDs = userSearchIndex.getSearchResults(usernamePrefix);
-    const usersInThread = threadOtherMembers(resolvedThreadMembers, viewerID);
+    const usersInThread = resolvedThreadMembers.filter(member => member.role);
 
     return usersInThread
       .filter(user => usernamePrefix.length === 0 || userIDs.includes(user.id))
@@ -131,7 +129,7 @@
         ),
       )
       .map(userInfo => ({ type: 'user', userInfo }));
-  }, [userSearchIndex, resolvedThreadMembers, usernamePrefix, viewerID]);
+  }, [userSearchIndex, resolvedThreadMembers, usernamePrefix]);
 }
 
 function useMentionTypeaheadChatSuggestions(
diff --git a/native/chat/chat-input-bar.react.js b/native/chat/chat-input-bar.react.js
--- a/native/chat/chat-input-bar.react.js
+++ b/native/chat/chat-input-bar.react.js
@@ -1312,7 +1312,6 @@
 
   const suggestedUsers = useMentionTypeaheadUserSuggestions(
     userMentionsCandidates,
-    viewerID,
     typeaheadMatchedStrings,
   );
 
diff --git a/web/chat/chat-input-bar.react.js b/web/chat/chat-input-bar.react.js
--- a/web/chat/chat-input-bar.react.js
+++ b/web/chat/chat-input-bar.react.js
@@ -643,7 +643,6 @@
 
     const suggestedUsers = useMentionTypeaheadUserSuggestions(
       props.inputState.typeaheadState.frozenUserMentionsCandidates,
-      viewerID,
       typeaheadMatchedStrings,
     );