For some reason for me, when I have my HomePod paired to my Apple TV 4k, it doesn't know how to do anything. I can ask it to do something and it'll pause for a bit and just say "I can't do that right now" I have to disconnect the HomePod from the Apple TV for it to actually return to working normally. Both are signed into my iCloud account, I've tried resetting the HomePod and stuff, it just becomes a dumb thing.