diff --git a/lib/reducers/message-reducer.js b/lib/reducers/message-reducer.js
--- a/lib/reducers/message-reducer.js
+++ b/lib/reducers/message-reducer.js
@@ -796,16 +796,12 @@
     action.type === fetchMessagesBeforeCursorActionTypes.success ||
     action.type === fetchMostRecentMessagesActionTypes.success
   ) {
-    const {
-      messageStoreOperations,
-      messageStore: mergedMessageStore,
-    } = mergeNewMessages(
+    return mergeNewMessages(
       messageStore,
       action.payload.rawMessageInfos,
       { [action.payload.threadID]: action.payload.truncationStatus },
       newThreadInfos,
     );
-    return { messageStoreOperations, messageStore: mergedMessageStore };
   } else if (
     action.type === logOutActionTypes.success ||
     action.type === deleteAccountActionTypes.success ||