Going fishing i had this issue for a while now. Called Sonos Samsung cable provider but cannot pinpoint the issue.
First a bit of background. Bought Beam and TV last fall. Sonos is plugged to TV through HDMI ARC and TV to PVR from provider through HDMI. Now often i get choppiness in sound to a point i have to reboot everything. It comes back after a while. Change HDMI cable no effect. Beam is hard wired connected to network. So is my TV. Tv seams fine without BEAM device. I submitted several diagnostic nothing came out. Very disappointed by the product so far. If anyone has an idea about what to try next… totally welling. I have removed my BEAM for now.