I’ve got a Sonos Beam connected via HDMI ARC to my Panasonic TX-48CX400B tv. Its all working fine however randomly while working, the volume control on the remote will no longer work on the Beam and reverts back to the TV volume (which is always at zero). From then on, I can only control the Beam volume via the Sonos app on my phone and the only way to get them back in sync, is to shut both off and leave it a few mins. This disconnect between the remote and the beam can somtimes happen after a few mins and other times, its still working perfectly hours later.
Any clues on where to start with this head-scratcher?