1) have an album in the db, keyed to the artist's name
2) change that artist's name _in the tags only_ (change accent on vowel)
3) scan 'look for new and changed music'
4) look up that artist by the pre-change name
5) album is still listed
6) click on album
7) listed as 'empty'

Looks like a bit of cleanup got missed, but this might only happen when an accent is changed.
Note that the filepath for the files is not changed (I'm keeping all files named in the OS *without* accents to accommodate MusicIP, but have made an attempt to keep accenting correct in the tags.)
This could easily be some kind of edge case because the files aren't actually gone.
I'd consider it minor as a "scan everything' will fix it, but severity isn't my call, is it?