Minecraft does not properly set 3D PBR materials on 3D Export

When exporting a selection from a structure block as a 3D export (glb) PBR materials are not properly formatted to export properly. This causes issues in other applications that use PBR, such as Blender or Microsoft's 3D Viewer. 

EXPECTED:

Minecraft should properly export and set PBR maps, such as Glossy, Emissive, etc.