Well this is the case since the “ wonderfull” app update the worst ever seen, it happens on all devices iphone, ipad, mac . If you change radio station to other station the app show the new station logo in the app, but it still plays the previous station. So station looks like it changed in the app but the actual stream did not. You need to stop the station and start it again the get the right stream playing. This is a software error ! Again I have seen other remarks on the forum all closed so it looks it solved. IT IS NOT ! Sonos do fix it !!!!!! As customers we have already been confronted with enough amateur software to last a decade…… So do not come to me on Wifi settings and blame it on someone else.
Maybe ask CHAT-GPT to fix it for you ?
