So for some reason my last post was closed without a resolution:
So I am following up here:
Ok so here’s a delayed brief update on my deleted post above…
I replaced my home router and extender with a new ASUS mesh router and then spent 4 hours getting all my Sonos devices onto the new network (despite I having the same name and password as the previous one, all my other devices in my house joined seamlessly). Like before the main soundbar was connected via Ethernet the system continued to cut out intermittently and a few days later unfortunately the new mesh extender I had just purchased died and I had to return to the manufacturer and get a replacement. When the replacement mesh router arrived I set them up again and spent another 4 hours trying to get my Sonos to connect to the network (with the new router). The system seemed to be behaving well and the sound did not drop out but this time the sub woofer in my living room was not playing any audio despite saying it was successfully connected to my Sonos network. After trying multiple resetting and troubleshooting options from this website I called tech support and the agent told me that it was because of he main soundbar was connected via Ethernet and should be using the WiFi instead which is totally contradictory to every else I have been told on this forum.
Needless to say when I switched the soundbar to WiFi the sub starting producing sound perfectly, however I am now back to square one because it is once again cutting out intermittently exactly the same before I started all this months ago…
Anyone else have any suggestions please? otherwise I will likely have to get rid of my Sonos.