diff --git a/lib/shared/community-utils.js b/lib/shared/community-utils.js
--- a/lib/shared/community-utils.js
+++ b/lib/shared/community-utils.js
@@ -32,6 +32,7 @@
 import type { ThreadSubscription } from '../types/subscription-types.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
 import { threadTypes } from '../types/thread-types-enum.js';
+import type { ThreadJoinPayload } from '../types/thread-types.js';
 import { useCurrentUserFID } from '../utils/farcaster-utils.js';
 import { useDispatchActionPromise } from '../utils/redux-promise-utils.js';
 import { useDispatch, useSelector } from '../utils/redux-utils.js';
@@ -324,9 +325,14 @@
     }
   }, [isAuthenticated, ongoingJoinData, setStep, step]);
 
+  const threadJoinPromiseRef = React.useRef<?Promise<ThreadJoinPayload>>(null);
   React.useEffect(() => {
     void (async () => {
-      if (!ongoingJoinData || step !== 'join_community') {
+      if (
+        !ongoingJoinData ||
+        step !== 'join_community' ||
+        threadJoinPromiseRef.current
+      ) {
         return;
       }
       const communityThreadID = ongoingJoinData.communityID;
@@ -344,6 +350,7 @@
         inviteLinkSecret: inviteSecret,
         defaultSubscription,
       });
+      threadJoinPromiseRef.current = joinThreadPromise;
       void dispatchActionPromise(joinThreadActionTypes, joinThreadPromise);
 
       try {
@@ -355,6 +362,8 @@
         );
         ongoingJoinData.reject();
         setOngoingJoinData(null);
+      } finally {
+        threadJoinPromiseRef.current = null;
       }
     })();
   }, [