It did fixes the simple example but I don’t think the issue is fully fixed.
Here is a pg with the mesh I’m working with
To explain a bit,
Hand_Skin, Hand_Muscles and Hand_Connective_Tissue are all skinned.
They move perfectly.
All the Hand_Bones_xxx and Hand_Bones_Cartillage_xxx are parented.
You should be able to see them slide.
Also on my full scene when the meshes Hand_Bones_xxx and Hand_Bones_Cartillage_xxx are displayed they cause a 20 fps performance drop on a GTX 1080.
The performance hit is present even when the animation is not playing.
In the Playground I don’t see it but I suppose it might be linked to the sliding issue or the parenting which would cause more processing to move the object than the skinned one.
Let me know if I can do something else to help tackle this.