It has happened again. I was away at our second home for two weeks, just got back to the main home and restored a backup from the second home. Both have a Roon ROCK.
A few weeks ago, I put everything back onto the production stream, so nothing is using beta now.
Same symptoms: Android devices connected to one particular WiFi access point can find the core but they can’t connect to it. My iPad is connected to the same WiFi access point and has no problems. If I move my Android phone to the other end of the house so it uses a different WiFi access point, it is fine.
Very strange.