I have a Sonos Arc in conjunction with a Sony XR-55A83J and I have two problems:
1) The volume can only be scrolled in increments of multiples of two (sometimes 18,20,22, sometimes 21, 23, 25, it maby depends on my previous settings of volume on phone), and sometimes I can't even see the slider even when the volume is increased or decreased.
2) Worse thing - it happens that once I play music on my phone from Spotify on the Sonos ARC, then randomly the sound from the TV doesn't come through. It's completely silent, it doesn't help even when I try to fiddle with all the sound settings on the TV, switch the output to TV and back. The TV even switches itself to that "Audio system" input, but it remains completely silent. The only thing that works is physically unplugging the Sonos from the power outlet.