Sampling regions don't get created when creating a mesh.

I'm trying to use VFX in specific regions on a character and would normally use sampling regions to do it easily, however the mutable mesh that is generated doesn't seem to be creating any of the ones on the source mesh. I don't see a way of enabling this or generating sampling regions in the customizable object or at runtime.

Steps to Reproduce

• Create a skeletal mesh
• Add a sampling region
• Name it
• Assign bones to it
• Add that mesh to a mutable customizable object
• Create an instance of that customizable object
• Check the mesh that is generated for sampling regions