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
@@ -1363,17 +1363,6 @@
           lastPruned: now,
         };
 
-    const updatedMessageStore = {
-      ...messageStore,
-      messages: {
-        ...messageStore.messages,
-        [localID]: messageInfo,
-      },
-      threads: {
-        ...messageStore.threads,
-        [threadID]: threadState,
-      },
-    };
     const messageStoreOperations = [
       {
         type: 'replace',
@@ -1386,13 +1375,17 @@
       messageStoreOperations,
     );
 
-    assertMessageStoreMessagesAreEqual(
-      updatedMessageStore,
-      processedMessageStore,
-      action.type,
-    );
-
-    return { messageStoreOperations, messageStore: updatedMessageStore };
+    return {
+      messageStoreOperations,
+      messageStore: {
+        ...messageStore,
+        threads: {
+          ...messageStore.threads,
+          [threadID]: threadState,
+        },
+        messages: processedMessageStore.messages,
+      },
+    };
   } else if (action.type === rehydrateActionType) {
     // When starting the app on native, we filter out any local-only multimedia
     // messages because the relevant context is no longer available