Unity broken animations at runtime

First, sorry for my english.

Is this a bug?

check video, idle animations are broken both for front and back view.
Back view (idle animation, legs) has even different sizes, and only walking animation modifies sizes

This happen after some "enable/disable" gameobjects (switching gameobject with unique animator and bones for front and back view. I'm making a new one for sides but... why is this happening?)

I’m using preview packages for 2D bone animation/rigging/skinning/IK

Fixed using “animator.Rebind()” before a gameobject disable (via setActive).