Why anisotrophy doesnt work on Material Layer?

Hey guys!

I’m making a project that has a anisotropic effect on a certeain part of the model. And on the beggining I thout work with material layer would be better to separate this effect from the rest of the mesh since the mesh whole mesh uses one UV. But when I get to make the aniso work on the especific par. I simply doesnt work!
When used with a normal master material and instances it works but isnt working on th layer version.

I’m using Ue 5.4 with lumen.

Material:

Imgur
Imgur
Imgur

Any tips why?

If you guys need any aditional information just le me know!

Thanks in advance!