Some TuneIn radio stations stop playing in the Music app, but play OK in TuneIn.

Some TuneIn radio stations have stopped playing in the Music app (on macOS 12.4), but play OK in the TuneIn app.

Note the stations haven't disappeared from Music -- and the UI appears to start playing them, but they remain silent.

All the ones that stopped working had played A-OK yesterday and any time before, ever since I started using Music for TuneIn radio.

I've restarted the Music app of course, but there's no change in its (mis)behaviour.