Anybody problems with Textures on Daz Genesis 3 models?

Has anybody tried to use DAZ Genesis 3 models and put multiple textures on it? like wounds, tattoos and so on?

I ran into a weird problem where you can only put multiple textures on the face material group. All other’s will not accept a second texture correctly. I had a discussion in Answerhub, but Epic took the position that it’s not their problem ()

It must be something that comes from the way the Daz model mesh is exported from 3DS which I use in my pipeline, but why? What makes this figure so different from others? Does anybody have a clue?