Jellyfin removing tags added manually

[zzzz272]

Info:
Version - 10.8.10 
Server - Repository install on Linux Mint
Clients - WebUI & Android TV (I believe the issue is serverside)

Background:

In my library, I add a custom tag "nope" via the WebUI to TV shows and movies that my wife is not interested in, so that they do not clutter up the libraries on her account. On her account I have it set to hide media items with the "nope" tag.

I have added the tag, and also checked the "Lock this item" option to attempt to prevent the tag from being removed. I have also verified that the "nope" tag does get added to the TV show or movie's .nfo file.


Issue:

At seemingly random, Jellyfin will remove the "nope" tag I have added from some of the media items, causing the TV shows or movies to reappear when viewing the media library on her account. According to the logs there are entries for the Movies folder (and some of the TV Shows that the tag was deleted from) saying it will be refreshed, however, since I check the "Lock this item" option, the tags/metadata should not be overwritten.

Is there an option I am missing, or is this a bug?


Edit:
On the few media items that I noticed today that had the "nope" tag removed, I tried re-adding the tag and only unchecking the "Tags" option at the bottom of the "Edit Metadata" window to see if that will prevent it from being removed.

[TheDreadPirate]

Do you have NFO files?

[zzzz272]

For each movie/TV show? yes

Edit: This is the line with the tags (after I have re-added it via the WebUI), replace the "-"s with "<" and ">", they are being erased by the forum software.

-tag-nope-/tag-

Edit 2: The media that i have locked, that has not yet had the tags removed by Jellyfin, also have -lockdata-true-\lockdata- in their .nfo files.

[TheDreadPirate]

I chatted with a dev. When NFOs are present the metadata lock is not honored. This is a known issue and is supposedly fixed or will be fixed in a later version.

https://github.com/jellyfin/jellyfin/issues/6248

Try adding the tag in the NFO.

Edit: Didn't see your edits. Are you saying that Jellyfin is writing the nope tag to the NFO? But still removing it later?

[zzzz272]

The tags do show up in the NFO files though, and it works as expected (hiding the media with the "nope" tag) for about a week, until the tag is removed by Jellyfin, presumably during a refresh of the media.

---

Here is the contents of a .nfo file that still has the tag:

https://pastebin.com/VeTKdn9Y

After a refresh, the "nope" is removed from the tags line, and the lockdata line is no longer there.