I have in my living room Arc+Sub+2xOneSL. When I set up everything works. Suddenly Arc disappears from the app, but not from the network. I have separate network that is only for Sonos speakers. The internet connection is fully open. I can see from the router side that the Arc is connected all the time to the network and has the IP address. When I restart Arc by pulling out the power cord and pluging it again, it comes alive and also appears to Sonos App. BUT... It should say under system Arc (+ Sub + Surround) now it says Arc ( + ? + ?). Only way to get everything up and running is removing the sub and surround setup, reset all speakers, rejoin them to the network and to system and set up system again. Not very nice from these products.
Is there anything that I can do? All speakers are connected via Wireless to WPA2-PSK network, both 2,4G and 5G band available (I have Ubiquiti Unifi network gear). This is now doing it more than once in a day, so it is starting to annoy me. Otherwise those are great speakers and I love the system, but this is something that I don't like.
Everything worked couple of months, now this started suddenly and without any network changes.