I use my HomePod as the speaker for my Apple TV. Works great. Then I turn my TV off and some time later I want to play music from my iTunes Cloud library. "Hey Siri play the Beatles." To which it replies, "'Hmmm . . . I'm having trouble playing that" The problem is the HP is still connected to the ATV for audio. To release it I have to turn my TV on, and either navigate my ATV to a program and turn it off or navigate it to settings/video and Audio/audio output. Either way it's a pain in the extremities. I think there should be a command such as 'Hey Siri disconnect audio from ATV.' Apple support tells me there's nothing there yet.