This happens to me all the time. Amazon Music stations that I have added to My Sonos seem to lose their connection to the station at Amazon. When I go to play the station from My Sonos, I get “Requested operation failed. Please try again.” I can go search for the station and play it from there fine. If I delete the station from My Sonos and re-add it, it plays fine.
So I don’t think it’s a networking issue. It seems to be a station identification issue. Sometimes it happens with one or two stations, other times all 10 Amazon stations stop working (again, from My Sonos only)
It’s annoying because I have to delete each station from My Sonos, the search for each one individually and add it back. This happens around once every two or three weeks.
Haven’t had any issue like this with Pandora.
Any ideas?