Inconsistent playback of blu-rays

Follow the organization & naming in the support document I linked.

If you use -featurette in the name, put the file in the same folder as the movie.

If you want the files in a subfolder, name it Featurettes, and don’t worry about adding -featurette to the file name.

Suggest you also add the year to the main folder, A Face in the Crowd (1957), since there are multiple movies, shorts, TV Episodes with the same name.

You may have to Plex Dance the files after re-naming/re-organizing. It is a bit of a pain, but clears any incorrect information out of Plex’s database before adding the updated info.

/Movies
  /A Face in the Crowd (1957)
     A Face in the Crowd (1957).mkv
     Facing the Past-featurette.mkv
     le01-featurette.mkv

or

/Movies
  /A Face in the Crowd (1957)
     A Face in the Crowd (1957).mkv
     /Featurettes
       Facing the Past.mkv
       le01.mkv