diff --git a/lib/reducers/master-reducer.js b/lib/reducers/master-reducer.js
--- a/lib/reducers/master-reducer.js
+++ b/lib/reducers/master-reducer.js
@@ -86,7 +86,12 @@
   // Only allow checkpoints to increase if we are connected
   // or if the action is a STATE_SYNC
   const { messageStoreOperations, messageStore: reducedMessageStore } =
-    reduceMessageStore(state.messageStore, action, threadInfos);
+    reduceMessageStore(
+      state.messageStore,
+      action,
+      threadInfos,
+      onStateDifferenceForStaff,
+    );
   let messageStore = reducedMessageStore;
 
   let { keyserverStore, keyserverStoreOperations } = reduceKeyserverStore(
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
@@ -110,7 +110,9 @@
   type ClientUpdateInfo,
   processUpdatesActionType,
 } from '../types/update-types.js';
+import { getMessageForException } from '../utils/errors.js';
 import { translateClientDBThreadMessageInfos } from '../utils/message-ops-utils.js';
+import { assertObjectsAreEqual } from '../utils/objects.js';
 
 const _mapValuesWithKeys = _mapValues.convert({ cap: false });
 
@@ -143,6 +145,31 @@
   );
 }
 
+function assertMessageStoreLocalMessageInfosAreEqual(
+  processedMessageStore: MessageStore,
+  expectedMessageStore: MessageStore,
+  location: string,
+  onStateDifference?: (message: string) => mixed,
+) {
+  try {
+    assertObjectsAreEqual(
+      processedMessageStore.local,
+      expectedMessageStore.local,
+      `MessageStore.local - ${location}`,
+    );
+  } catch (e) {
+    console.log(
+      'Error processing MessageStore local ops',
+      processedMessageStore.local,
+      expectedMessageStore.local,
+    );
+    const message = `Error processing MessageStore local ops ${
+      getMessageForException(e) ?? '{no exception message}'
+    }`;
+    onStateDifference?.(message);
+  }
+}
+
 const newThread = (): ThreadMessageInfo => ({
   messageIDs: [],
   startReached: false,
@@ -751,6 +778,7 @@
   messageStore: MessageStore,
   action: BaseAction,
   newThreadInfos: RawThreadInfos,
+  onStateDifference?: (message: string) => mixed,
 ): ReduceMessageStoreResult {
   if (
     action.type === legacyLogInActionTypes.success ||
@@ -1656,6 +1684,19 @@
         action.payload.messageStoreThreads ?? [],
       );
 
+    const actionPayloadMessageStoreLocalMessageInfos =
+      action.payload.messageStoreLocalMessageInfos ?? {};
+
+    assertMessageStoreLocalMessageInfosAreEqual(
+      {
+        ...messageStore,
+        local: actionPayloadMessageStoreLocalMessageInfos,
+      },
+      messageStore,
+      action.type,
+      onStateDifference,
+    );
+
     const newThreads: {
       [threadID: string]: ThreadMessageInfo,
     } = { ...messageStore.threads };
diff --git a/lib/utils/message-ops-utils.js b/lib/utils/message-ops-utils.js
--- a/lib/utils/message-ops-utils.js
+++ b/lib/utils/message-ops-utils.js
@@ -25,6 +25,8 @@
   type RawMessageInfo,
   type ClientDBThreadMessageInfo,
   type ThreadMessageInfo,
+  type ClientDBLocalMessageInfo,
+  type MessageStoreLocalMessageInfos,
 } from '../types/message-types.js';
 import type { MediaMessageServerDBContent } from '../types/messages/media.js';
 
@@ -272,6 +274,19 @@
   };
 }
 
+function translateClientDBLocalMessageInfos(
+  clientDBLocalMessageInfos: $ReadOnlyArray<ClientDBLocalMessageInfo>,
+): MessageStoreLocalMessageInfos {
+  return Object.fromEntries(
+    clientDBLocalMessageInfos.map(
+      (localMessageInfo: ClientDBLocalMessageInfo) => [
+        localMessageInfo.id,
+        JSON.parse(localMessageInfo.localMessageInfo),
+      ],
+    ),
+  );
+}
+
 function getPinnedContentFromClientDBMessageInfo(
   clientDBMessageInfo: ClientDBMessageInfo,
 ): string {
@@ -295,4 +310,5 @@
   getPinnedContentFromClientDBMessageInfo,
   translateClientDBThreadMessageInfos,
   translateThreadMessageInfoToClientDBThreadMessageInfo,
+  translateClientDBLocalMessageInfos,
 };
diff --git a/native/data/sqlite-data-handler.js b/native/data/sqlite-data-handler.js
--- a/native/data/sqlite-data-handler.js
+++ b/native/data/sqlite-data-handler.js
@@ -26,6 +26,7 @@
   type RecoveryFromDataHandlerActionSource,
 } from 'lib/types/account-types.js';
 import { getMessageForException } from 'lib/utils/errors.js';
+import { translateClientDBLocalMessageInfos } from 'lib/utils/message-ops-utils.js';
 import { useDispatchActionPromise } from 'lib/utils/redux-promise-utils.js';
 import { useDispatch } from 'lib/utils/redux-utils.js';
 import { supportingMultipleKeyservers } from 'lib/utils/services-utils.js';
@@ -244,6 +245,7 @@
           auxUserInfos,
           threadActivityEntries,
           entries,
+          messageStoreLocalMessageInfos,
         } = await commCoreModule.getClientDBStore();
         const threadInfosFromDB =
           threadStoreOpsHandlers.translateClientDBData(threads);
@@ -268,6 +270,9 @@
           );
         const entriesFromDB =
           entryStoreOpsHandlers.translateClientDBData(entries);
+        const localMessageInfosFromDB = translateClientDBLocalMessageInfos(
+          messageStoreLocalMessageInfos,
+        );
         dispatch({
           type: setClientDBStoreActionType,
           payload: {
@@ -285,6 +290,7 @@
             auxUserInfos: auxUserInfosFromDB,
             threadActivityStore: threadActivityStoreFromDB,
             entries: entriesFromDB,
+            messageStoreLocalMessageInfos: localMessageInfosFromDB,
           },
         });
       } catch (setStoreException) {
diff --git a/web/shared-worker/utils/store.js b/web/shared-worker/utils/store.js
--- a/web/shared-worker/utils/store.js
+++ b/web/shared-worker/utils/store.js
@@ -16,6 +16,7 @@
   ClientStore,
   StoreOperations,
 } from 'lib/types/store-ops-types.js';
+import { translateClientDBLocalMessageInfos } from 'lib/utils/message-ops-utils.js';
 import { entries } from 'lib/utils/objects.js';
 
 import { defaultWebState } from '../../redux/default-state.js';
@@ -145,6 +146,18 @@
       entries: entryStoreOpsHandlers.translateClientDBData(data.store.entries),
     };
   }
+
+  if (
+    data?.store?.messageStoreLocalMessageInfos &&
+    data.store.messageStoreLocalMessageInfos.length > 0
+  ) {
+    result = {
+      ...result,
+      messageStoreLocalMessageInfos: translateClientDBLocalMessageInfos(
+        data.store.messageStoreLocalMessageInfos,
+      ),
+    };
+  }
   return result;
 }