Can't find media in a folder

[mauri1223]

Each movie is a single .mkv file with the name following plex/jellifin suggestions (basically the same).
My Structure looks like this

Movies/DC/Batman/...single file movies
Movies/Marvel/Avengers/...single file movies

The only folder that isn't working is the "DC"

- Tried moving "Movies/DC/Batman" folder to "Movies/Marvel" and it works

I just found a weird behavior:
-If the folder "Movies/DC/" have only folders inside it works.
-If the folder "Movies/DC/" have folders and multiple files on the root it works too.
-If the folder "Movies/DC/" have folders and a single file on the root don't ready any folder, only read the root file.

I added a random extra movie to the root of "Movies/DC/" and everything works.
I tried on other folders and works the same. The only folder I had with a single file on the root was "Movies/DC/" ....so I guess I need more DC movies 🤣

Anyways is super weird