--- a/dom/media/MediaCache.cpp
+++ b/dom/media/MediaCache.cpp
@@ -2301,16 +2301,21 @@ MediaCacheStream::NotifyClientSuspended(
   nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
     "MediaCacheStream::NotifyClientSuspended", [client, this, aSuspended]() {
       AutoLock lock(mMediaCache->Monitor());
       if (!mClosed && mClientSuspended != aSuspended) {
         mClientSuspended = aSuspended;
         // mClientSuspended changes the decision of reading streams.
         mMediaCache->QueueUpdate(lock);
         UpdateDownloadStatistics(lock);
+        if (mClientSuspended) {
+          // Download is suspended. Wake up the readers that might be able to
+          // get data from the partial block.
+          lock.NotifyAll();
+        }
       }
     });
   OwnerThread()->Dispatch(r.forget());
 }
 
 void
 MediaCacheStream::NotifyResume()
 {