I too am having issues with intermittent audio between my new 65” 2020 Samsung Frame TV and my new Sonos Arc. Every morning, after the tv has been off, the audio is intermittent: maybe ½ second of sound every 3 seconds. The tv is connected with a new high speed HDMI cable (came with the Arc) into the eArc port in the TV.
Unplugging the sound bar from power and plugging back in fixes the issue as long as the tv stays on. But this is not a solution, only a work around.
I am so tired of this problem I have forgone the ATMOS feature and connected the ARC to the tv using the provided optical converter.
Does anyone no of a fix for this? Sonos tells me to unplug the ARC and Samsung tells me to unplug the TV. Neither seem to have a fix.
Sonos - please help a loyal and long time customer!