Jitters in bones of armature in fbx export but can't see those jitters in blender

Support Animation and Rigging
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1

I have made an animation where a cricket player stances for the ball, so everything looks fine in the blender scene but whenever i try to export the character with animations, i can see jitters or random movement in the legs of character in the fbx and same in unity scene which i cant see in the blender scene.

here is the scene of blender- https://youtu.be/oDLmjJtQZcM

here is the scene of fbx review- https://youtu.be/NjFW-FGh6QY

2

Have you tried setting the Simplify to 0 in the fbx exporter-> bake animations drop menu?

Are you using Ik in blender? As far as I know they’ll get lost or break when exporting as a .fbx turning the whole thing into a simple armature fk rig which can cause some discrepancies. I’m probably wrong though.