Need Help - Exported Animation Contorted

Hello,

I am trying to use UMotion to quickly adjust the hand placement of my attack animations for two handed weapons. IE the weapon is parented to right hand and left hand is slightly misaligned at certain points in the animation.

The attack animations come from another model (Model A). I am editing the animations on Model B. When I import animations, I enable hand/foot IK.

I double checked both fbx models were in T-pose and even enforced it. Both are humanoid.

The animation looks fine when I import on Model B, the hand IK looks perfect but when I export, the animation is all wonky and twisted.

https://i.postimg.cc/NG7ZQfqJ/Screenshot-2025-06-12-023405.png

I've also tried creating a new layer and saving/baking the keys, that didn't work either.

Please help. I can edit animations fine if the animation is from the source model but when I try to retarget on another model with the main purpose to add hand IK to fix two-handed grip weapons, the exported animation is all wonky.