Apple TV pauses
Apple TV pauses randomly, it doesn't matter which app. I can press play / pause and it will continue with the program but it will pause again, on its own.
Apple TV 4K, tvOS 15
Does the issue persist after hiding the Siri remote in a metal container? Some container that blocks bluetooth.
If it turns out that the remote is the issue, and if you are still within warranty, then contact Apple. Else consider buying a replacement remote.