When any script is added it pauses my 9 frame animation by one frame

I have a looping 9 frame animation loaded as a .gif into Animate CC as a HTML5 Canvas document.

When testing just the .gif alone it loops perfectly fine in Safari and Chrome browsers.

However, when I add anther layer with any scipt at all attached the animation pauses for a frame in both browsers.

What is going wrong here?

The specific actions which are causing the loop to pause are a mouseOver script and a OnMouseClickGoToWebpage script.

I am receiving the: Frame numbers in EaselJS start at 0 instead of 1. For example, this affects gotoAndStop and gotoAndPlay calls.