Start decryption process if needed

src/Notifier.ts

@@ -331,6 +331,8 @@ export const Notifier = {
         if (!this.isSyncing) return; // don't alert for any messages initially
         if (ev.sender && ev.sender.userId === MatrixClientPeg.get().credentials.userId) return;
 
+        MatrixClientPeg.get().decryptEventIfNeeded(ev);
+
         // If it's an encrypted event and the type is still 'm.room.encrypted',
         // it hasn't yet been decrypted, so wait until it is.
         if (ev.isBeingDecrypted() || ev.isDecryptionFailure()) {

src/stores/widgets/StopGapWidget.ts

@@ -395,6 +395,7 @@ export class StopGapWidget extends EventEmitter {
     }
 
     private onEvent = (ev: MatrixEvent) => {
+        MatrixClientPeg.get().decryptEventIfNeeded(ev);
         if (ev.isBeingDecrypted() || ev.isDecryptionFailure()) return;
         if (ev.getRoomId() !== this.eventListenerRoomId) return;
         this.feedEvent(ev);