Server Version#: 1.18.9.2571
Seems like a bug.
Have one album from a ceratin artist that was matched correctly, but seems one song was corrupted (error while copying probably), and I noticed it while listening - it was 1 minute instead of 4 min long, and when I checked the size of the file, it was 2 MB instead of 7.
I copied that song again, refreshed metadata, but couldn’t get the whole song in any way, and it kept stopping after one minute.
So I deleted the song from the player, copied it again to the album, and now can’t see it in the player ( in the album) in any way.