Changes in behavior of AnimatorIK while editor is stopped

Hello.

I confirmed it with 5.6.0f1, but it is consultation about the problem that IK is working differently from the previous version.
IK does not work when Animator.Update is called while the editor is not playing.
OnAnimatorIK will not be called.
It works fine with 5.5.2f1.

5.5.2f1
Editor playing: It works
Editor stopped: It works

5.6.0f1
Editor playing: It works
Editor stopped: It does not work

Was this intentional change made?
Is there a way to make it work even while the editor is stopped?

Thanks for finding this is a bug. im working to fix it for 5.6

pp