After having my Sonos Arc, sub and two Sonos 1 SL surround speakers tonight the system started crackling and cutting in and out. I have a Apple TV hooked up to a projector the a HDMI Matrix Switch. The sound goes through the optical to HDMI adaptor and again has worked great for a few months till now. I did submit a diagnostic report 1066721761. Would love help. Have loved my system so this is frustrating to say the least.
Mod Edit: Corrected typo for clarification