Metahuman Rig doesn't work on one Metahuman but works on the rest.

I have made a custom metahuman (right) and spent some time texturing only to realize the rig is broken in sequencer.
I downloaded some other metahumans (left and middle) and they seem to work just fine.
My custom human only work with the facial control but not the body.
As you can see they all have their arms up but the last one doesn’t.
How do I fix this?
I have already tried rebuilding and redownloading it with the MHC but still doesn’t work.
I even duplicated it in MHC and made some minor adjustments and still no juice…

EDIT: I have found that replacing the overweight body mesh underneath with the body from the other metahuman makes her move again.
In fact, I tried downloading a ready made overweight metahuman and she didn’t work either. It appears they may be a bug with the female_short_overweight body mesh in general. I still need a fix cause replacing the body has some clipping around the ankles and wrists.

Yea this is really bizarre that this hasn’t been fixed. I’m having the exact same issue.