Animation doesn't play on Start

Hi, I recently met this problem.

There are no logic errors in my blueprints, but it seems doesn’t work.
I don’t know if animation starts from another place, or if simply it’is not started: I’ve got some problems with FBX export…

I insert a Draw/Selection weapon anim with a notify, if the timeline’s cursors reach the notify, then Draw passes to Idle-Run:

Now, I don’t know if the two blueprints’ content contain the nodes required to Execute the animation Blueprint.
I tested. If I switch IsReady, the animation pass to the Idle-Run state.
Also there’s a problem between Idle-Run and Attack but maybe I’ll speak about this problem in the future, this because I know the causes and I’m
tring to resolve by myself.

But for this problem, I don’t see solutions.
If the concept is not clear, Here’s a video.

What do you think?
Maybe Is the mesh that become invisible on play(?)