Audio sync issue is terrible and seems to get worst after each update. I switched to HDHomeRun app on the 4K AppleTV and audio syncs fine so I know this is the issue with channels app.
Any solutions?
Which Apple TV? And audio driver?
I want to chime in here and say I experience the same thing. When I reset the wireless audio sync in the ATV settings, it works fine again. The issue for me is that I use headphones a lot at night, so leaving the audio sync not calibrated is not a good long term option.
Latest 4K model.