First, when posting, you need to tell us what version you are using so we know how to answer since previous versions work differently.
Second you need to think differently.
Make a symbol with only the first part of the animation (circle disappearing). Make sure autoplay is off on main timeline and the circle timeline.
Take off all code on the circle.
Add this code on the symbol actions:
First, you need to copy-paste that ellipse element, and turn the opcaity to 0 so that it's completely invisible, and then bind those mouse events to this invisible element, removing from the original ellipse element.
And instead of using mouseover event, use mouseenter.
Also you should update your version to the proper version of the previous version since there was an update to correct problems \. Go tho the link below - login to the cloud and choose version 2014.
You may want to also update to the current version.
Since you can have both versions, if you update to the current version and want to have both versions, first update to new and then use the link above to re-install previous version.
The process I described above will work on both versions.
corrected file previous version:
Thank you for your replies, I'll update my Edge version <3