I don't really know how to answer this question because I can't recall a time where that was ever something that concerned me. It may have happened once or twice over the course of thousands of games, but I couldn't relay a specific example off the top of my head. As a CV player, the only ship I can recall feeling a notable reduction in AA from over the course of a game was a Kremlin as her AA was nerf'd long ago to make it very destructible (I believe the mount health was reduced by 50%).