Not enough info to see if this is a Sonos problem that more people have, or that it is just you.

I have the same problem. And I have lots of details:

There is one album I have that shows up wrong three times. Usually that happens to me when the “album artist” is different on different songs. In this case maybe it’s because the album is marked as a “compilation”, but it has and album artist? In any case, here is what the album looks like in itunes:
 

There here is where this ends up on my file server:
 

This used to work find on my Sonos system, for many years. But now I see the “album artist” listed three times in my library:
 

And  under each copy is the same one album:
 

And when I open the album, there is only one song there!
 

I think this is a sonos issue, not a client issue, as I used the Sonos v2 app, SonoPad, and with windows controller, and all three have this same behavior.

Could your problem be related to the Sonos programming choice mentioned here? Music Library Compilation Issue under new 16.3 Firmware | Sonos Community

It could be related to that. But that issue says you must have an “album artist” that is the same for all the songs on that album, which I do. But thanks for the link!

Does Sonos list the requirements for your music library to be indexed correctly? I have spent quite a bit of effort on that, and can re-tag things both in iTunes and with more low level mp3 tagging software. I would imagine in this case some re-tagging would fix the issue, but I’d be shooting in the dark for this one.

Well, I told iTunes that it wasn’t a compilation, and that fixed that record.