Hi,
at my log I found several messages like this over the day. My Sonos (13 different players) are on one subnet with my ESXi based Supervised HA installation (Home Assistant 2023.3.5 / Supervisor 2023.03.1 / Operating System 9.5 / Frontend 20230309.1 - latest):
WARNING (MainThread) [homeassistant.components.sonos.speaker] Subscription renewal failed for Sonos [NAME]: 412, message='Precondition Failed', url=URL('http://[IP]:1400/ZoneGroupTopology/Event')
Playing and controll with Sonos Apps is working fine and the Sonos Network Matrix shows mostly green this warnings at HA from different players and sometimes Players are not showed at frontend.
Any I can check?
Steffen