diff --git a/lib/components/sync-community-store-handler.react.js b/lib/components/sync-community-store-handler.react.js
new file mode 100644
--- /dev/null
+++ b/lib/components/sync-community-store-handler.react.js
@@ -0,0 +1,76 @@
+// @flow
+
+import * as React from 'react';
+
+import {
+  useFetchCommunityInfos,
+  fetchCommunityInfosActionTypes,
+} from '../actions/community-actions.js';
+import { isLoggedIn } from '../selectors/user-selectors.js';
+import { threadTypeIsCommunityRoot } from '../types/thread-types-enum.js';
+import { FetchTimeout } from '../utils/errors.js';
+import { useDispatchActionPromise } from '../utils/redux-promise-utils.js';
+import { useSelector } from '../utils/redux-utils.js';
+
+function SyncCommunityStoreHandler(): React.Node {
+  const loggedIn = useSelector(isLoggedIn);
+  const threadInfos = useSelector(state => state.threadStore.threadInfos);
+  const communityInfos = useSelector(
+    state => state.communityStore.communityInfos,
+  );
+  const callFetchCommunityInfos = useFetchCommunityInfos();
+  const dispatchActionPromise = useDispatchActionPromise();
+
+  const requestedCommunityInfosRef = React.useRef(new Set<string>());
+
+  React.useEffect(() => {
+    if (!loggedIn) {
+      return;
+    }
+
+    const communityRootThreads = Object.values(threadInfos).filter(thread =>
+      threadTypeIsCommunityRoot(thread.type),
+    );
+
+    const missingCommunityInfos = communityRootThreads.filter(
+      thread =>
+        !(thread.id in communityInfos) &&
+        !requestedCommunityInfosRef.current.has(thread.id),
+    );
+
+    if (missingCommunityInfos.length === 0) {
+      return;
+    }
+
+    missingCommunityInfos.forEach(thread =>
+      requestedCommunityInfosRef.current.add(thread.id),
+    );
+
+    const fetchCommunityInfosPromise = (async () => {
+      try {
+        return await callFetchCommunityInfos();
+      } catch (e) {
+        if (e instanceof FetchTimeout) {
+          missingCommunityInfos.forEach(thread =>
+            requestedCommunityInfosRef.current.delete(thread.id),
+          );
+        }
+        throw e;
+      }
+    })();
+    void dispatchActionPromise(
+      fetchCommunityInfosActionTypes,
+      fetchCommunityInfosPromise,
+    );
+  }, [
+    callFetchCommunityInfos,
+    communityInfos,
+    dispatchActionPromise,
+    loggedIn,
+    threadInfos,
+  ]);
+
+  return null;
+}
+
+export default SyncCommunityStoreHandler;
diff --git a/native/root.react.js b/native/root.react.js
--- a/native/root.react.js
+++ b/native/root.react.js
@@ -34,6 +34,7 @@
 import PrekeysHandler from 'lib/components/prekeys-handler.react.js';
 import { QRAuthProvider } from 'lib/components/qr-auth-provider.react.js';
 import { StaffContextProvider } from 'lib/components/staff-provider.react.js';
+import SyncCommunityStoreHandler from 'lib/components/sync-community-store-handler.react.js';
 import { UserIdentityCacheProvider } from 'lib/components/user-identity-cache.react.js';
 import { DBOpsHandler } from 'lib/handlers/db-ops-handler.react.js';
 import { HoldersHandler } from 'lib/handlers/holders-handler.react.js';
@@ -390,6 +391,7 @@
                                                     <PrekeysHandler />
                                                     <ReportHandler />
                                                     <AutoJoinCommunityHandler />
+                                                    <SyncCommunityStoreHandler />
                                                     <InitialStateSharingHandler />
                                                   </PersistedStateGate>
                                                   {navigation}
diff --git a/web/app.react.js b/web/app.react.js
--- a/web/app.react.js
+++ b/web/app.react.js
@@ -24,6 +24,7 @@
 import PlatformDetailsSynchronizer from 'lib/components/platform-details-synchronizer.react.js';
 import { QRAuthProvider } from 'lib/components/qr-auth-provider.react.js';
 import { StaffContextProvider } from 'lib/components/staff-provider.react.js';
+import SyncCommunityStoreHandler from 'lib/components/sync-community-store-handler.react.js';
 import { DBOpsHandler } from 'lib/handlers/db-ops-handler.react.js';
 import { HoldersHandler } from 'lib/handlers/holders-handler.react.js';
 import { TunnelbrokerDeviceTokenHandler } from 'lib/handlers/tunnelbroker-device-token-handler.react.js';
@@ -258,6 +259,7 @@
                   <TunnelbrokerDeviceTokenHandler />
                   <FarcasterDataHandler />
                   <AutoJoinCommunityHandler />
+                  <SyncCommunityStoreHandler />
                   <DMActivityHandler />
                   <HoldersHandler />
                   {content}