beets unimproved reports imported music

[nolith]

Hello, thank you for this great piece of software.

I've spent some time importing my music collection paying attention to not piss off my Navidrome server.

When I finally finished I wanted to check if I forget to import something and I enabled the unimported plugin.

It gave me a lot of tracks, and I was sure that I imported those.

$ beet unimported
/Volumes/music/alessio/Savage Garden/Truly Madly Deeply/02 Truly Madly Deeply (Australian version).flac
/Volumes/music/alessio/David Bowie/The Man Who Sold the World/03 Black Country Rock.flac
/Volumes/music/alessio/David Bowie/The Man Who Sold the World/09 The Supermen.flac
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/02 Come as You Are.mp3
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/13 All Apologies.mp3
/Volumes/music/alessio/David Bowie/The Man Who Sold the World/05 Running Gun Blues.flac
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/12 Lake of Fire.mp3
/Volumes/music/alessio/David Bowie/The Man Who Sold the World/04 After All.flac
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/08 On a Plain.mp3
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/05 Pennyroyal Tea.mp3
/Volumes/music/alessio/U2/Songs of Innocence/Digital Booklet - Songs of Innocence.pdf
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/06 Dumb.mp3
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/09 Something in the Way.mp3
/Volumes/music/alessio/David Bowie/The Man Who Sold the World/01 The Width of a Circle.flac
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/10 Plateau.mp3
/Volumes/music/alessio/David Bowie/The Man Who Sold the World/02 All the Madmen.flac
/Volumes/music/alessio/David Bowie/The Man Who Sold the World/06 Saviour Machine.flac
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/14 Where Did You Sleep Last Night.mp3
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/04 The Man Who Sold the World.mp3
/Volumes/music/alessio/Talco/Tutti assolti/10 Signor Presidente.flac
/Volumes/music/alessio/David Bowie/The Man Who Sold the World/08 The Man Who Sold the World.flac
/Volumes/music/alessio/Savage Garden/Truly Madly Deeply/04 This Side of Me.flac
/Volumes/music/alessio/Savage Garden/Truly Madly Deeply/03 Truly Madly Deeply (Night radio mix).flac
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/01 About a Girl.mp3
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/11 Oh Me.mp3
/Volumes/music/alessio/Non-Album/The xx/Angels (Live In Tokyo).m4v
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/07 Polly.mp3
/Volumes/music/alessio/David Bowie/The Man Who Sold the World/07 She Shook Me Cold.flac
/Volumes/music/alessio/Nirvana/MTV Unplugged In New York/03 Jesus Doesn’t Want Me for a Sunbeam.mp3

As you can see, if I ask beet if "Jesus Doesn’t Want Me for a Sunbeam" is in my collection, the answer is yes, but it's still reported as not imported.

$ beet ls -p "Jesus Doesn’t Want Me for a Sunbeam"
/Volumes/music/alessio/Nirvana/MTV Unplugged in New York/03 Jesus Doesn’t Want Me for a Sunbeam.mp3

Am I doing something wrong, or is this a legitimate bug?