Muscle limit change not affecting result of Animator.SetLookAtPosition

I'm calling the Animator.SetLookAtPosition function on my third person character controller to have the character aim at where the crosshire is pointing. It works great until I try to have him look down, in which the body constraint barely lets him hunch over. So I edited the avatar and extended the muscle limit for his abdomen so he can hunch over more, but when I hit Play, the SetLookAtPosition function does not acknowledge the change to the muscle limit. Is there something I need to do for it to recognize my muscle limit change?

 

I'm having the same issue too~

Animator.SetLookAtPosition

seems like not taking account of muscle limit. Did you manage to figure out anything there?