After the update to my Apple TV I am not longer able to play my Apple TV through my Home Pods.
Apple TV
I previously had my HomePod mini's set as the default audio on my ATV-4K. Following updating to the latest TV beta, the HomePods showed as connected as the default audio but no audio came through. ATV displayed a Airplay message on screen...."Try again(to connect) or change default audio. I reset everything ...still no luck. Then (by accident) I set default audio to TV Speakers and selected my HomePod minis by pressing and holding the Home Screen button. I selected Airplay and HomePod mini's and audio worked!!! So my suspicion is the latest beta has some issue with airplay when selected as default audio but not temporary audio.