No bug. You are targetting wrongly but I am not sure I understand what is what.
Actually I was wrong. I made it and it works.
I am not sure this is what you want but here is the code that worked for me:
var mySymbolObject = sym.getSymbol("HoverExample");
var targetElement = mySymbolObject.$("backing");
var targetHit = mySymbolObject.$("hitbox");
Sorry just updated the file with change for mouseout.
Hey thanks. I will look into it with the file.