You probably can do this with Custom Behaviours but here is one which works using JS.
The first trick os to make the animations on each scene a Persistent Symbol. But only on the Parent scene.
Because it is persistent it will remember it’s current properties and not reset them on load like a normal scene will.
( think of Symbols as independent scenes )
The Symbols do not need anything special apart from the the mouse out element also should be included as a child.