Cinema 1200 - Audio or Video Dropouts (AppleTV)
There have been reports of audio and video dropouts happening when using the Netflix app on Apple TV's. This is a known issue with Apple TV, and will occur even if the soundbar is disconnected.
A power cycle of the Apple TV and the affected tvOS version (15.2) should resolve the issue temporarily, and hopefully a future update of the Apple TV will fix this issue permanently.
If you would like more information on this topic, here are some links describing this issue:
If you have further questions, or have found a potential workaround for this issue, please let us know in the comments below!