Yeah she's not supposed to die. But the bug/oversight I have, is that if I am left to die, Astarion says that he's already apologized, etc, and the team has reactions as if he did, but there's no scene for it after CHARNAME is brought back. (trying to pretend we've done something we haven't eh???)
Also you can, I believe, get the scroll of revivafy or whatever, and use that without teleporting. Best of luck.