is it a bug that lets me basically force an opponent to stop moving if i hit him with the curse than rapidly hit space? makes fighting a lot of things easy since they cant move if you do it.
There are a few bugs which the Dev team may or may not know about which are related to spamming moves/space/clicks during the animation of an enemy turn, or right before their animation, which allows you to skip their turn sometimes. To answer your question, yes i would think its a (fairly serious) bug, and have accidentally duplicated it a few times just by clicking or pressing the right button at the right time. But it does not always happen.