I can't seem to find a search function for questions, so please forgive me if this ha been brought up already.
Maybe more of a bug report than a question.
So, I unlocked an achievement during a drill. During the time the achievement popup was on screen, the timer appeared frozen. Upon closing the popup, the timer had reached zero, and the item was added to my 'tomorrow' set of questions. Is there any way to avoid the achievement popup while a drill is in progress? I like seeing it, I just don't want it to affect my progress.