Unable to move pawn

I create Player BP from Pawn class and add the static mesh as root component. Mass in KG for mesh equal zero, but if I place this mesh on the scene mass will be greater than zero. And if I apply force to pawn’s mesh, it moves good.

  • Collision geometry exist
  • Density of the PhysicalMaterial applied
  • Mass scale greater than 0

Why in Pawn BP static mesh mass = 0?