Painter 11.1.3 | FBX vs. USD import | Different Shader/Material Names

When I use a FBX file it uses correctly the Material Name that is assigned to the Mesh:

Assignment in the Maya Model file:

When I use a USD file it uses the Shading Group not the Sader as a Name:
 

I checked my USD and the Shader is still assigned: 
 

It would be great to have only one way of naming here either for both the material name or for both the shading group name, but mixed is confusing our pipeline when exporting the texture files. 

Thank you!

Best regards,

Timo