@BTurvey,
I agree with @bockersjv - such connection matters, can be unrelated to the Sonos software. As an example you only need to encounter a router that has Wireless AP isolation, or is blocking SSDP multicast messaging, to run into such issues, or have a ‘managed switch’ setup incorrectly, or perhaps wireless extenders operating on different channels/subnet and such issues can arise.
My son-in-law had an issue following an update to his BT Smart Hub router this weekend that disabled the 2.4Ghz WiFi band from talking to the 5Ghz band - it just need a checkbox change on the router to fix the issue for Sonos to work again.
For many hundreds of thousands of Homes, Sonos products and their accompanying Apps work just fine… it’s sometimes (often) an issue somewhere else in the network environment that needs to be addressed. So it’s helpful to provide as much detail as you can to try to help resolve the situation.
Of course it’s true to say, that sometimes their can be hardware compatibility issues with a few network or mobile devices and sometimes the only way around that kind of problem it to lookout for software updates or perhaps try to change the hardware. Fortunately those sort of things are few and far between, but usually there’s information about such devices on this forum and elsewhere online.
The best thing really is to describe your setup in detail, the issues you are seeing with any error messages and then see if the matter can be resolved with the help of folk here in the community or perhaps by later contacting Sonos customer support. A good many things can and do get resolved for the majority.
