Paired Marshall speaker sound problem

Hi

i have always used a Marshall 2 Stanmore speaker with my appleTV 4k without any problem but today I got an extra Stanmore speaker that I paired in the Marshall app before connecting both to the appletv. Seemed to work fine at first but then the issues started so I’m hoping someone here has a fix:

1. First problem is when my phone rings now audio is muted on the Apple TV and there is no way for me to disconnect the speakers from my phone as they “are paired” the option under Bluetooth to disconnect/forget is gone. Annoying but will manage.
2. Biggest problem. When I change app, for example go from Netflix to Disney or Apple Music the sound stops working and I have to go into the menu select tv speakers before changing back to Marshall speakers and then they. What is the problem here?

any help would be appreciated as I was hoping to speakers would give

better sound instead of many new issues😊