Is Animator.SetBoneLocalRotation working as intended for the hips?

'Animator.SetBoneLocalRotation' changes the local rotation of a bone to a given value, but not for the hips.

Code (CSharp):

1.      Animator anim;
2.  
3.      private void Start()
4.      {
5.          anim = GetComponent<Animator>();
6.      }
7.  
8.      private void OnAnimatorIK(int layerIndex)
9.      {
10.          anim.SetBoneLocalRotation(HumanBodyBones.Hips, Quaternion.identity);
11.      }

I believe this was supposed to lock the hips local rotation on 0/0/0 correct? It's affecting the hips rotation somehow but not as expected. Can anyone confirm this if this is a bug? Maybe I'm missing something?

I'm trying to lock the hips at a certain rotation. It's easy to do it on LateUpdate but I need to do it in OnAnimatorIK because I am using some IKs.

 

I also get this bug, if i do:

Code (CSharp):

1. var t = animator.GetBoneTransform(HumanBodyBones.Hips);
2. animator.SetBoneLocalRotation(HumanBodyBones.Hips, t.localRotation);
3.  

the hips don't stay where they are supposed to be, but are rotated twice by that rotation. I read somewhere this bug is not getting fixed because it would break backwards compatibility?
https://issuetracker.unity3d.com/is...t-setbonelocalrotation-is-set-on-onanimatorik
is there some way to disable this behavior or do we have to hard code a work around for the hips?
like so?:

Code (CSharp):

1. animator.SetBoneLocalRotation(HumanBodyBones.Hips, Quaternion.Inverse(t.localRotation) * ...);

which seems really dirty

p.s: the rotation is still off and this does not work, it's still off by 7°

how can we get the hips to rotate to an exact rotation?

 

seems it has to be done via bodyRotation

Code (CSharp):

1. var t = animator.GetBoneTransform(HumanBodyBones.Hips);
2. animator.bodyRotation *= Quaternion.Inverse(t.localRotation) * ...;