SOLVED: Missing files

[Phantom]

Hi,

I'm using jellyfin 10.8.10 in a docker on my Unraid server. 
I'm having an issue where some files are detected and some other are not in the same folder.

I have a  hierarchy like so:

-- Media
---- Movies
------- Harry Potter
------------ Harry Potter - And the philosophers stone.mkv
------------ ...
------------ Harry Potter - And The Deathly Hallows Part 1.mkv
------------ Harry Potter - And The Deathly Hallows Part 2.mkv
------- Star Wars
...
---- Series
------- Serie A
------- Serie B


My issue is that in case of the harry potter movies for example, Jellyfin sees  Harry Potter - And The Deathly Hallows part 1 and 2, but none of all the other movies in the folder.
They are using same format, extension and naming.

Also tried to put each one in a subfolder, didn't help.

What could cause jellyfin to not see these files?

Thanks!