Since the 15.2 release there is quite a few songs that display this error when trying to play them. These seem to be mainly songs that are not lossless. They were purchased over time from Apple Music. They will still play if I use the Apple Music app, but they will no longer play from Sonos app. I suspect some lossy codex broke with latest release. Occurs with all my Sonos products.
Is this a known issue?