Is Animator.SetBoneLocalRotation working as intended for the hips?

I believe 'Animator.SetBoneLocalRotation' should change the local rotation of a bone to a given value. And it works like that, except for the $$anonymous$$ps.

     Animator anim;
 
     private void Start()
     {
         anim = GetComponent<Animator>();
     }
 
     private void OnAnimatorIK(int layerIndex)
     {
         anim.SetBoneLocalRotation(HumanBodyBones.Hips, Quaternion.identity);
     }

I believe t$$anonymous$$s was supposed to lock the $$anonymous$$ps local rotation on 0/0/0 correct? It's affecting the $$anonymous$$ps rotation somehow but not as expected. It's also not getting locked to a particular rotation. Can anyone confirm t$$anonymous$$s if t$$anonymous$$s is a bug? Maybe I'm missing somet$$anonymous$$ng?