Mesh Deform Modifier

Hi guys i used mesh deform modifier to rig my character. But if i rotate my rig in 90 to 180 in z axis (Global) I got problem with my mesh. Mesh is getting scaled when i rotate the rig. Can anyone help me Please?

Make sure the rig object, the mesh object & the deform mesh object all share the same point of origin. Make sure all object have the same scale & rotation.

If this doesn’t help, post the .blend file