Wukong bug interaction with clone, Gameplay

Wukong has what I am fairly certain is a bug although I don't play wukong very often, but when you buy a duskblade, it causes a ward to become visible every 90 seconds, if he spots a ward after using his clone he will again reactivate this ability.... really easy to test, get a wukong, buy a duskblade of draakthar, have an enemy place down a ward, don't clear it, but have it pop duskblade passive anyways. Then while duskblade passive is on cooldown and while within range of ward activate clone ability, should pop up with option to clear ward again as magically duskblade will reactivate for the clone, not sure if it is possible to do this more than once or if each instance of Wukong has a chance for duskblade to activate only once, I would assume this is similar on other clone champions, Ie shaco and leblanc. Cool