Problem while using the 3D previews on character

Whenever i’m putting a gear on my character. I’ve notices that when i click on the 3D previews the decals and unions, inside the gear changes/disappear from the gear items!

You can see the issue on the video below: (I am pressing the 3D previews and the decals and union colors change on the items as seen below)

This seems to be a problem! while using the 3D preview as seen below!

Catalog Item in 3D:

Link to item: