Don't send events after window is gone

events/EventBus.ts

@@ -28,8 +28,10 @@ class IpcMainEventBus implements EventBusInterface {
   }
 
   public emit<MessageType>(event: Event<MessageType>, msg: MessageType) {
+    if (!this.client.isDestroyed()) {
       this.client.send(event.topic, msg)
     }
+  }
 }
 
 class IpcRendererEventBus implements EventBusInterface {