Broadcast messages with google home, without interrupting music/video


I made a flow in node red which casts a message using google home with tts.google_translate_say service.

The problem is that it does not resume the previous state. If it is playing a music on Spotify, it does not resume it. If it is playing a video on youtube, it does not resume it. Furthermore, on google nest, the screen remains black with the cast icon on the center…very annoying.

Any idea how to cast a message without interrupting the previous state of the google device?