Nonsense. She was sentenced to death, and she acts like she has never seen the artifact before. Even if what you say has some plausibility to it there is no chance she would not have bought up the fact that the artifact was in the room at that time instead of acting like she has no idea where it is whilst her life is on the line because of that one specific object!
Furthermore, you have just uncovered another potential plot hole, why would she not have taken the artifact, after all it was her sole purpose? Instead she leaves it alone, and goes back to the general to report she doesn't have it, and does not know where it is?
For a game that boasts reactivity, they sure did leave it out for the meaty parts it appears.
Well...you know...they were literally in the process of erasing her mind when you stop them. We'll just call it brain damage I guess. Plus Minthara missing lines of dialogues and the second half of her romance in act 3 are well known issues that Larian have said they're working on so this could be one of them. I wouldn't put that much energy into outrage quite yet. The game still has a few wrinkles but Larian are hard at work ironing them out.
