Do you have any BodyForces or scripts in your place that would affect your jumps?
Are all of the purple doll Parts Massless?
Yep, is Masless and no scripts and no BodyForces just BallSocketConstraint
Answer both questions please and thanks.
It looks like there is a bodyvelocity or BodyForce in there somewhere.

Have you tried jumping without the doll?
Also I see in the title (ALR FIXED). Does that mean you’ve solved it?
You should put how you solved it in a post and mark that as the Solution using the Solution button at the bottom of the post.
I fixed it this way: I did the whole doll again, I put it masless and disabled the collision and I gave each part of the doll a different name

Since you already solved this, mark your comment as a solution so people don’t try fixing it later (since idk why but people can’t read the post name half the time)