Extras in some folders not detected

[Mr_Generic]

I tried renaming the file to just:  D01T03 - Ridley Scott Introduction.mp4, but it did not help.
I even tried bob.mp4, but that didn't work either.

Then I thought I'd try the File Suffix approach, rather than folders.  Here are my findings:

The following File Suffixes DID NOT work:
- Trailer:          D01T03 - Ridley Scott Introduction-trailer.mp4
- Other:            D01T03 - Ridley Scott Introduction-other.mp4

The following File Suffixes DID work:
- Sample:           D01T03 - Ridley Scott Introduction-sample.mp4
- Scene:            D01T03 - Ridley Scott Introduction-scene.mp4
- Clip:             D01T03 - Ridley Scott Introduction-clip.mp4  (displays as featurette)
- Interview:        D01T03 - Ridley Scott Introduction-interview.mp4
- BehindTheScenes:  D01T03 - Ridley Scott Introduction-behindthescenes.mp4
- Deleted:          D01T03 - Ridley Scott Introduction-deleted.mp4
- DeletedScene:     D01T03 - Ridley Scott Introduction-deletedscene.mp4
- Featurette:       D01T03 - Ridley Scott Introduction-featurette.mp4
- Short:            D01T03 - Ridley Scott Introduction-short.mp4  (displays as featurette)
- Extra:            D01T03 - Ridley Scott Introduction-extra.mp4  (displays in Special Features with no tag)

The fact that I can get this feature to work with some folder names and some file suffixes tells me that this Jellyfin feature is working for the most part. 
It's just only some of them are not working.

Hope this information is helpful.
- Bob