Animation jitters after Retargeting Exporting.

Hello, I have the problem that my animation jitters after I retarget it. in the retargeting preview the animation looks good only after exporting it doesn’t work anymore. look at the attachment.

Preview:


After Exporting:

i still haven’t found a solution, here is a video of the retargeted animation at runtime.

i still haven’t found a solution, is this a UE5.1 bug ?