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Animation flickers on enable
I have a problem with Spine and Mecanim interaction
In runtime I activate Spine game object and call Animator.Play (name animation) in one script and in one frame. When animation is running I turn the object off. Then I again activate game object and call Animator.Play (this animation), I see one frame of previous animation in it's previous state witch it was interrapted.
This doesn't happen when using unity's native animations.
I don't know, what I have to do? 
Minimal reproducing project: https://www.dropbox.com/s/m7qogaa0elycyiy/Spine%20issue.zip?dl=0
Spine Editor 3.6.44
Unity version 2017.1.0f3
This may be an execution order thing.
If you want to update it immediately, call skeletonAnimator.Update() and then skeletonAnimation.LateUpdate() right after you call Animator.Play();
Though based on this graph: https://docs.unity3d.com/Manual/ExecutionOrder.html
I'm not sure if Animator.Play actually immediately changes the state or only in Unity's internal update.
Give the above calls a try though.
Hi Pharan, thank you for answer! 
I've done what you'd told. I call skeletonAnimator.Update() right after I call Animator.Play();
But I have related problem now :S
Object is turned off. When I activate game object and run animation, there is one frame of default state before animation is run. You can see it on the gif below.
m_target.SetActive(!m_target.activeSelf);
if (m_target.activeSelf) {
_animator.Play(m_animName);
_skelAnimator.Update();
}
Spine screenshots (I have two animations):
Minimal reproducing project: https://www.dropbox.com/s/otjobhwjwypyq40/Spine%20issue.zip?dl=0
Spine Editor 3.6.45
Unity version 2017.1.0f3
P.S
How do I get a link here? :o
I think they disabled links for people who have very low post counts. Just to prevent spambots from linking to dangerous places. Just standard stuff.
We can still see the url. Don't worry.
That gif seems a bit stuttery.
Again, I'm not sure about the rules that Mecanim follows regarding its execution order.
I'm not sure if we can remedy the one-frame delay but there's probably something that can be done about one-frame pose popping up.
Your repro project seems to have had an unrelated problem that was causing the first frame to pop up.
There was a NullReferenceException because you were trying to call _skelAnimator.Update(); where _skelAnimator was null.
Adding a null check seems to have eliminated that first frame problem.
Thanks for helping me!
Yes, project had a problem, sorry for that. But this problem was related to mecanim's naitive animation only. I've already fixed it.
Mecanim's native animations work perfectly well. You can see it on green triangle, I had made it by Unity naitive animation.
I added a null check, and it is still doesn't work.
Сorrected project: https://www.dropbox.com/s/ytzao6ohlq9768g/Spine%20issue1.zip?dl=0
If the execution order thing is the source, I guess you can force the animator to update using animator.Update(0) before calling skeletonAnimator.Update?
That at least removes the randomness if you haven't set anything in Script Execution Order.
Hi Pharan, thanks a lot, now it's working perfectly! :party: :sun: