Lumineon V able to activates its ability again on bench

I played lumineon V going second on turn 1, grabbing a supporter from my deck, and attached a balloon to it. The next turn, I played shopping centre stadium, and attempted to retrieve the balloon attached to lumineon V. After that action, the game somehow asks me if I want to activate lumineon V's ability, which I said yes. Then I was able to search for a supporter from my deck.