My CC4 version is: 4.33.2315.1
My OS is Win10
My Graphics card is: geForce RTX 4080

I'm following the "assigning extra bones" tutorial:
https://www.youtube.com/watch?v=KnMASxmeiWQ


Steps to reproduce:
From CC export, clothed character, fbx, mesh only, for Blender
From Blender import fbx, add a bone, export it as fbx
From CC create character, import, choose the fbx exported from Blender, choose Humaniod, apply, pick any profile for autoconversion, hit ok
Go to Skin Weights, select Paint or Selection, select any bone:

The bone will turn purple to show that it is selected, but the mesh will stay solid and you will not see any colors to represent the skin weights. Under display, you can click the show wireframe box, but nothing will change. The model will not go to wireframe and you still can't see any colors for Skin weights.  

I started a ticket with tech support because this seems like a bug, but I'm also posting here in case I'm just not doing something right in the interface. Thanks much for any help