Button wont change color on relative timeline when cursor is on it

Hello,

The problem is when I let the cursor on the button until the animation is done. Then, when I remove the cursor, the button change some of it’s properties back to it’s original setting.

I’ve speed up the animation, maybe it will be easier to see : https://dl.dropboxusercontent.com/spa/0dk04bt2bjkz0ot/Exports/TestButtons/TestButtons.html

When active, the button should always be green text on black background, but with this bug, it’s going back to black text on light gray.

I would need a Function which can disable the button during the animation and then re-enable it… I think !

Thanks