I am thinking that your developers do not go through any validation process with different testing of their phases. I have Spotify installed and switching from SONOS App (playing Spotify) to my GUI of Spotify on a Windows 10 machine that there is no auto seek for new devices so they're not really much use. Please can you intergrate some kind of feature that allows users to switch from Sonos App and Spotify GUI to actually see devices. Now I know you will push back saying its all to do with Spotify and not SONOS but you guys work closer to them than we do so work together and pull this out the bag where we have a search for added devices in Spoitfy or if not possible then at least make sure SONOS app releases the hold it has on the speakers and make them beacon out when available.
Eventually you'll get there and after nearly 4 years Im starting to like your product