In DDQ today using OBW, her blue power won’t fire off if there are no CD’s available. It gave error that says required tile not on board.
Edit: Seems to be a problem only when fighting goons.
If your team is at full health and there are no countdowns on the board then Anti-Gravity Device has nothing to do. And that’s is more likely when you’re fighting goons who only do damage if their countdowns go off.