Inherited Skeletal Mesh Components do not work for Mapping Control Rig Component

Control Rig Component does not work with inhereited Skeletal Mesh Components. They only work with non inhereited Skeletal Mesh Components.

[Link Removed]

• Open EngineTest
• Create a New Blueprint using the Character class (this has an inhereited Skeletal Mesh Component)
• Change the Mesh Component to use the SK_Box_Morph1 Skeletal Mesh
  [Image Removed]
• Add a Control Rig Component - use the VariableDemo_CtrlRig class
  [Image Removed]
• In the Construction Script - add the mesh to the Control Rig Component via Add Mapped Skeletal Mesh
  [Image Removed]
• In the Event Graph, add a BeginPlay and a Pre-Forward Solve event - attach a Custom Event to update a float value randomly over a delayed timer, and then set that float value to be a parameter in Control Rig.
  [Image Removed]
• Then drag the blueprint into an empty level and hit play

Result: Nothing happens

Expected: The box should change color and change shape