Ok this one is quite “big”. This is why Geralt hates portals:
I suppose someone has reported this issue. But I haven’t seen it anywhere, especially not in youtube.
Maybe it was the case when someone reported that he has pressed “end turn” and nothing happened. He searched for enemy and couldn’t find it. Well, you need to use explosives in proper place to see that last “little” enemy.
There are also animation problems in this building.
PS. Restarting map didn’t help her - she is stuck there for good. You can’t also walk on the roof of that building because she is blocking the way. But you can’t see her.