This is strange!?

I have a HomeKit home and Apple Music.

The symfonisk are visible in home app. 

If I make a shortcut to play music directly to my symfonisk speaker and run it, then Apple TV hijacks that and stream to my speakers. 

If I then wants to watch a show on my tv, then the music pause, and plays the sound through my speakers. 

I can not watch a show with audio on the tv speakers and play music on the same time on the symfonisk. 

They are not in the same room !???

If I play directly to the speakers from Sonos app, then I can watch a show on Apple TV at the same time.