HomePod Stereo Pairs as default audio for AppleTV4K experiencing volume fluctuations while watching content.

It seems that something in a recent update may have changed how stereo pair HomePod setups are handling their audio streams resulting in the audio volume getting suddenly quieter for a few minutes, then jumping back to a louder volume, rinsing and repeating over and over to the point where watching anything is becoming obnoxious. I haven’t changed anything in my set-up and have restored some of the devices, but this issue is affecting all three of the Apple TV 4K with Stereo Paired HomePod (full size and minis) in our home.

The audio problems are happening with content being played on the AppleTV (it’s system-wide, affecting all apps I stream content through). I was thinking it might have something to do with the surround/Atmos options with the Stereo Pair having issues handling the channels correctly, but those options are all completely locked in the settings app, so my ability to troubleshoot is very limited.

I would rather have consistent audio than a surround sound experience, so if there is any way to disable this for video content on the Apple TV + HomePod pairs, that would be great. I welcome any other troubleshooting tips you may have.