Dolby Atmos streaming issue with Sonos Arc Ultra and BenQ TK710 projector

Hello! I use my Arc Ultra connected to my eARC BenQ TK710 dolby atmos capable projector. I use an ATV4K 2022 edition. Very often whenever I want to stream Atmos content on any platform I get no audio at all! The Sonos app shows no audio! If I force the ATV4K to play DD5.1 then it works again! Or If I leave it on Auto, Atmos on then the 5.1 content reads Stereo PCM on the Sonos app. Is this happening to you? I have changed cables..I am using Ruipro 8K fiber optic cables 25 ft the green ones and still the same issue. I have to disconnect the Arc from power and plug it back in for it to work again with Atmos.

[Re-Titled by Moderator]