Multidecade sonos owner. I've seen tunein stations come and go. I've had issues playing certain stations on S1 because it didn't support the stations bitrate (radio dismuke) but was fine on S2.
I've a problem with a specific tunein station called “radio synthpop”. It queues, it plays TuneIn ads, it shows the song playing, the song playing updates when the next song starts -- but not one hint of audio. I can play it through a browser no problem.
Can someone do me a favor and see if you can reproduce this by loading this station?
I can't post the image of it (sigh) but it's purple, green, and white. SynthPOP RADIO “Tu Defecto... Perfecto".
https://tunein.com/radio/Synthpop-Radio-s190690/