Mesh distorted during animations exporting from Blender + Rigify to Unity 2020

Support Animation and Rigging
1

I finished my first 3D Character with a couple of animations using Blender 2.8 and Rigify.

I’m exporting it to Blender as FBX file and everything seems to work. The only problem I have is with the Walk animation. There are points where the mesh of my character just starts to deform.

Unity:

Blender:

I don’t understand what I’m doing wrong.

Export settings:

238×974

Thank you for your time.