Jellyfin not reading albums correctly from offline .nfo files

[ScrapPaperLord]

TLDR in my setup I use an external scraper program to identify all my albums because Jellyfin inevitably doesn't identify them correctly or loads them with info I find inaccurate or extraneous, and I listen to a lot of self-published music that MusicBrainz & Discogs tend to not know.

I have zero problems with artists, but most of my albums come in like this:

With the folder name being declared the album name. Oftentimes the cover is missing, too, even though it is present in the folder, as folder.jpg/.png.
Opening the metadata shows that it's mostly empty:

Even though that's simply not true.


Perhaps most frustratingly though a minority of albums come in correctly for seemingly no reason, though several of them are also missing their covers.


I have no metadata scrapers enabled at all. I have no image scrapers enabled at all, but I DO have "Image Extractor" enabled, as well as "Save Artwork in Media Folders".

Things I've tried:
* Turning on and off the .nfo Metadata Savers. (it's currently off but it seems to make no difference)
* Rebooting the Jellyfin server
* Scanning the library with "scan for new and updated files", "search for missing metadata", and "replace all metadata", both with the metadata saver .nfo setting on and off.
* Removing the library entirely and recreating it
* Manually deleting the entries for artists/genres in the metadata folder before scanning
* Rebooting my server PC

I don't have this issue at all with visual media, either, just the music folder.

Thanks in advance and I'll happily give any further info needed to diagnose this.

[ScrapPaperLord]

Now it's not finding new albums from artists that are already in the database. I added four albums to one artist and it refuses to find them, even after following all the same attempts I made above.
For note, everything was operating as it should until the last version update.

[ScrapPaperLord]

Updated to 10.11.8 and it changed nothing. In fact, things are mildly worse now:

As it's no longer finding -any- information, not even the artists.
I don't have ANY metadata providers on in the music library, and never have.
I've read through the "Local .nfo metadata" part of the manual several times now and it's not helped my situation at all. The manual says:
"It's currently not possible to disable .nfo metadata. Local metadata will always be fetched and has priority over remote metadata providers like TMDb."
But it's clearly not true-- every single album I have has a .nfo I wrote myself that's being ignored.

I am 100% sure that the right permissions are in place.
I am 100% sure my music is laid out per the manual's instructions.
I have ZERO problems with my movies or TV shows, just music.
The part that's particularly puzzling for me is that when it does fill in an album it often does it with information that I have no idea where it's getting it through.
For instance, I took the internet adapter fully out of the host PC to try to see if it would behave if I had literally no internet connection at all. I told it to update the metadata for the X-Japan album "Vanishing Vision".
Here is the .nfo file as I wrote it. Note the genres in particular.

Here's how the album appeared after I did a "replace metadata". Note the genres and the track names. I do not have "j-rock" as a genre anywhere in my music library.

Curious to see if it was somehow getting it from MusicBrainz, Discogs, or TheAudioDV even though I was offline, when I got online I checked, and neither of them has "j-rock" as a genre for this album:

It's not getting it from the embedded data of the .flac either:

When I update while online, this typically happens.
My nfo:

After forcing replace-- note genres and identifications:

I'm just completely baffled by all of this. Tiny Media Manager works perfectly for handling my visual media but I can't get local .nfo to work at all for my music and I am completely out of ideas at this point.