A couple of days ago I went to play an album from my Apple Music library though my Sonos Connect, and could not find it. Looking more closely, I noticed that the “Albums” menu item only contains a tiny fraction of my music library - almost everything is missing. “Recently Added” and “Playlists” both look OK, but “Albums” is bad. I see the same on several controllers: Windows, Mac, iPhone, iPad are all the same.
Moreover, in the Windows application, when I visit “Albums”, I can browse it for a short time, and then the application terminates (the window just closes with no error message).
My library looks perfectly fine in iTunes and the native Apple Music app.
I left it a few days in case it was a transient effect but it persists.
I have tried removing the Apple Music service from my system and reconnecting it afresh, but this does not help.
I probably need a Sonos support case for this but the web site suggests that I try the forum first. I generated diagnostics 641008197 in case it helps anybody.