Control Rig not working on android mobile

Hi,
I have set up un pawn with a skeletal mesh and a control rig, with a controller that drive my controls for the hands an feet of a character. It works well in the mobile viewport preview, but doesn’t when i launch it on my android phone. It seems that the “Add Mapped Skeletal Mesh” in the “On Pre Initialize (ControlRig)” doesnt work… Anyone has an idea ?
Thank you very much

Willy