Animation import into Unity - mesh deform I rigged some FPS hands and a gun and started make animations. I'm really struggling import my animation from Blender 2.8 to Unity.

The Animations look fine in Blender like it should, but are messed up in Unity.

don't know the causes of this problem and already searched several hours for a solution.

Changing the compression of the animation in Unity makes this problem less bad, but its still noticeable and for sure not a proper solution.

If you need more info about the project settings just let me know.
The method I use is to select in pose mode all (and only) deforming bones, go to Menu Pose/animation/Bake action, and create a new action, clearing all constraints and parenting, so that the Fbx I'm exporting is a clean rig, with no constraints, associated to the clean mesh. Make a copy of both mesh and rig before any attempt (You'll have to try out some exporting preferences, according to the needs). It works fine.