diff --git a/src/services/syncQueue.ts b/src/services/syncQueue.ts
index f55afc0..d857104 100644
--- a/src/services/syncQueue.ts
+++ b/src/services/syncQueue.ts
@@ -50,12 +50,16 @@ async function uploadReplaySession(session: ReplaySession): Promise<void> {
  */
 export async function syncOfflineQueue(): Promise<SyncResult> {
   const currentUserId = getAuth().currentUser?.uid;
-  const queue = await getQueue();
+  if (!currentUserId) {
+    throw new Error("User not authenticated — cannot sync offline queue");
+  }
+
+  const queue = getQueue();
   let synced = 0;
   let failed = 0;
 
   for (const session of queue) {
-    if (!currentUserId || session.userId !== currentUserId) {
+    if (session.userId !== currentUserId) {
       continue;
     }
     try {