My Sonos system consists of an Arc Ultra and Era 300’s in my TV room, a Beam in bedroom, as well as a Sonos Port connected to living room speakers.

I had quite a bit of problems after updating to the latest system (16.5) through the mobile app.  When complete, only my Arc appeared as part of system.  I had messages through the app that the Beam and Era 3000’s had to be connected- one after another. That worked fine for the Beam.  Then, when trying to re-connect first Era 300, it ended up giving me an error message repeatedly.  Rebooting did not help.

After rebooting the second Era 300, it appeared as available, and I was able to re-connect it.  The other Era 300- the first one I tried to connect, did not appear. I re-booted it again, and then at some point the two ERA 300’s appeared, as did their surround designation, and everything worked.

Since this type of component disconnection and difficulty in re-connecting had not occured for me prior to this, I am bringing this to your attention.

Thanks.