Mesh has 8 materials, only makes 1 slot at import

Hello lads, Im using 4.23.1 :

-Working a mesh in .obj format

-Reimport the mesh as I make changes to it, everything working fine

-Last time I reimport I clicked something I dont know what

-Now all meshes that I import make 1 material slot for the entire mesh instead of the ones I set up

-Searching and tweaking the import settings without results

-Somehow search in the internet, couldnt find anything

-Re-making the entire project is not an option

Gentlemen, any clues?

Have you tried not working with .obj if I remember correctly Wavefront loses a lot of information on export such as rotation materials relative location etc… FBX is your best bet.