Retarget animation issues after export animation

Hi,

I have a strange issues, in the preview the animation is perfect, but after export,
it is like deformed,

I realized that this happens on all meshes using the UE5 skeleton and when retargeting animations from a that pack (from fab)

See on this video

2025-08-10 18-13-14.mkv (6.4 MB)

Any idea to fixe it, please ?

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make a youtube video of it and upload

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