I’m experiencing the same audio sync issues that others have shared. Initially the issue seemed to be limited to H.265 4K HDR content, but I am now seeing regular audio sync issues with both H.265 4K and H.264 1080p content. Plex is the only app on my Apple TV where I am seeing this. I’ve had to switch to the Infuse app for most media playback, as it has no such issues with the same media files. The fact that this has been a known, widespread issue for more than a year and still hasn’t been addressed is really unacceptable.