Button sequence behavior inconsistent

Hello,

In the project I am working, I have two slides using a Marker, a Rectangle and an Arrow, set up in this way:

Rectangle is intended to be a control that will navigate to a new slide when clicked. Initial state is hidden.

Arrow is intended to call the attention to the rectangle. Initial state is hidden.

When a marker is clicked:

  • Rectangle state is changed to Normal with a fade in animation.
  • Arrow state is changed to Normal after the fade in animation of the rectangle is completed, also with a fade in animation. 

Two slides are set up in exactly the same way. In one slide, the rectangle behavior is working. On the other, it is not. I can't for the life of me figure out why... 

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