Hi @jbnbpt,

It’s difficult to tell exactly what’s happening here, but I can suggest a couple of things:

• First of all, and this may sound obvious but it’s worth checking, ensure that your new music is located inside the folder that Sonos is pointing to. If it’s recently purchased albums from iTunes/Apple Music then you need to make sure they’re downloaded to your computer inside the folder that’s been added to Sonos when you set up your Music Library. You can check the folder path by opening the Sonos app on your PC, selecting Manage, Music Library Settings.
• If the music is downloaded inside that folder, try updating the folder once more, and once it’s complete, submit a system diagnostic and get in touch with our customer care team. They’ll be able to analyse the report and see if there are any errors being flagged up internally.

So the problem was sort of in the genre of your first answer, but not exactly. I went into iTunes and checked the file paths of the recently added songs that were not showing up in Sonos, and found that they were different. A couple of weeks earlier I had started syncing all my folders with Dropbox under some new super sync program they have, and dropbox had somehow hijacked the file path so that it started ////dropbox/// etc etc. The timing was right. So I just guessed that was the problem with recent playlist changes not showing up too. So I turned off the dropbox syncing and let Sonos sync on schedule and everything went back to normal. F-ing dropbox did it. And they weren’t even in the dropbox folder.

I’m glad you were able to trace it back….but it’s somewhat disturbing behaviour from DropBox.