Can you please describe the precise symptom you’re experiencing? Do your Zones disappear from Settings → Audio, or do you see any errors presented in the Roon UI?
It sounds like you’re experiencing intermittent dropouts or Zone disappearance as a result of network disruption. Do you rely on a mesh network with Roon, or is your Windows 11 PC connected to the main router?
For due diligence, please ensure that a system update hasn’t removed RoonServer.exe, RAATServer.exe, and the other Roon background processes from the Microsoft Defender firewall.
The more information you can share about your network topology, the more equipped we’ll be to assist from here. Please list the make and model of the main router you use with Roon.
Please additionally share an approximate timestamp (or the name of the track playing in Roon) when you last experienced any disruption. We’ll use this to pinpoint the event in diagnostic logging.