Unfortunately, yes. [There's no mincing words about it: that's the one drawback to relying on magic for combat. The good news is that because it's such a common problem, she has a number of ways to deal with it.]

That's why I usually stick to quick and easy fireballs when my enemies are already close enough to strike. To pull off spells like these, I'd need a good amount of distance, or some allies keeping the enemy occupied while I cast... or I can use levitation to stay out of danger for a while.