I have SONOS devices in numerous rooms, all connected via my home wi-fi (Apple Extreme) including a SONOS BOOST.
Recently, the entire system has shut down and disappeared from the app of my iPhone (except my SONOS MOVE) each room slowly reappearing. It might then reconnect to the internet radio channel to which I was listening.
I have rebooted the SONOS BOOST and the Apple Extreme but the problem promptly occurred again.
I would be grateful for any suggestions.