Hi @Richard_Williamson1 ---- Thank you for the report and sharing your feedback with us. Very appreciated!
Moving forward, by chance are any of your Sonos endpoints near your router? The reason I ask is because we had another user report/experience a similar issue and when they moved the Sonos endpoint that was closest to their router further away, things stabilized.
Furthermore, they also mentioned the following in regard to how Sonos recommend configuring their devices (taken from the manual):
If you have a Sonos product wired into your WiFi router, separate the two devices as far as the Ethernet cable between them allows; 1 ft. (30cm) or more is ideal. Also make sure your Sonos system and router are operating on different wireless channels.
-Eric