Cosmos Asset Lost Material

Hi everyone, I’m having a frustrating problem with using Asset Chaos. I imported an asset and converted it to a mesh. When I try to edit a face or part of the mesh, it automatically loses the material, and even trying to reattach it manually doesn’t apply it correctly.

I use the PLE version of Vray for Maya.​

A reminder of what is and is not included in the PLE version here.
Otherwise, importing the proxy as a mesh causes it to lose its Material IDs; you need to reassign them (or the materials) manually.