AnimDynamics Deforming the Mesh

Hello, I’m experiencing a problem with AnimDynamics and I cannot find the cause. I have this character and want to apply dynamics on a chain of bones but when I do apply it the mesh gets deformed, I have tried playing around with box extents and local joint offset settings and nothing seems to fix it. I also made sure the mesh is properly skinned to the bones. Im attaching pictures of the issue, my settings and my rig. Thanks!

edit: Fbx is imported from Maya

Imported from Blender, per chance?

I don’t know anything about animation, but I do know this subject crops up a lot:

Oh sorry, forgot to mention that, it is imported from Maya