diff --git a/src/durable/notifications-hub.ts b/src/durable/notifications-hub.ts
index ad72f7f..0b9c132 100644
--- a/src/durable/notifications-hub.ts
+++ b/src/durable/notifications-hub.ts
@@ -174,7 +174,7 @@ function buildSignalRMessagePackInvocation(
   target: string = 'ReceiveMessage'
 ): Uint8Array {
   // SignalR MessagePack hub protocol uses an array-based invocation shape:
-  // [type, headers, invocationId, target, arguments]
+  // [type, headers, invocationId, target, arguments, streamIds]
   const encodedPayload = encodeMsgPack([
     1,
     {},
@@ -187,6 +187,7 @@ function buildSignalRMessagePackInvocation(
         Payload: messagePayload,
       },
     ],
+    [],
   ]);
   return frameSignalRBinary(encodedPayload);
 }
@@ -217,7 +218,9 @@ export class NotificationsHub extends DurableObject<Env> {
       const revisionDate = String(body?.revisionDate || '').trim() || new Date().toISOString();
       const userId = String(request.headers.get('X-NodeWarden-UserId') || body?.userId || '').trim();
       const contextId = String(body?.contextId || '').trim() || null;
-      const updateType = Number(body?.updateType || SIGNALR_UPDATE_TYPE_SYNC_VAULT) || SIGNALR_UPDATE_TYPE_SYNC_VAULT;
+      const rawUpdateType = body?.updateType;
+      const parsedUpdateType = typeof rawUpdateType === 'number' ? rawUpdateType : Number(rawUpdateType);
+      const updateType = Number.isFinite(parsedUpdateType) ? parsedUpdateType : SIGNALR_UPDATE_TYPE_SYNC_VAULT;
       const targetDeviceIdentifier = String(body?.targetDeviceIdentifier || '').trim() || null;
       const payload = body?.payload && typeof body.payload === 'object'
         ? body.payload
diff --git a/webapp/src/App.tsx b/webapp/src/App.tsx
index 25bb9be..f88c768 100644
--- a/webapp/src/App.tsx
+++ b/webapp/src/App.tsx
@@ -1626,7 +1626,7 @@ export default function App() {
             continue;
           }
           if (contextId && contextId === getCurrentDeviceIdentifier()) continue;
-          if (updateType === SIGNALR_UPDATE_TYPE_SYNC_CIPHERS) {
+          if (updateType === SIGNALR_UPDATE_TYPE_SYNC_CIPHERS || updateType === SIGNALR_UPDATE_TYPE_SYNC_VAULT) {
             if (notificationRefreshTimerRef.current !== null) {
               window.clearTimeout(notificationRefreshTimerRef.current);
             }
@@ -1660,7 +1660,6 @@ export default function App() {
             deleteSendLocally(resourceId, revisionStamp);
             continue;
           }
-          if (updateType === SIGNALR_UPDATE_TYPE_SYNC_VAULT) continue;
         }
       });