Hello ​@bryantsf, welcome back!

I am glad you were able to fix the issue you were facing with the Sonos Beam (Gen 2) audio cutting out while playing Atmos content.

If you would like, please share what you did to fix the issue for anyone else that might have the same experience as you.

Thanks for the post.

Unplugged the Beam (for 10 seconds), switched the TV audio out of pass though and back to pass though, and plugged Beam back in (it didn’t work). So I unplugged the Beam and TV both for 10 seconds then plugged back in and it worked perfectly.

Someday everyone will read an interconnection standard and come up with designs that work together every time. 

Don't hold your breath!