Apple Music plays music without sound on iOS 18

When listening to playlists, Apple Music just randomly "plays" songs without sound. You can see the bar moving (to indicate how much time has elapsed and how much time is still left), but you won't hear anything until you hit the "back" button to restart the song.

Seems like an iOS 18 bug.

I'm using Airplay with IKEA Symfonisk speakers (by Sonos).