1.1.5 Wizards hostile and not getting away in Charred Scar

[Mankeli]

I'll just copy this from the spoiler's section:

Here is what I did: 1) Movement infusion when I saw the two wizards. 2) Move one tile while moving fast. 3) Use Stone wall to trap Elandar (this was my grand scheme from the beginning, to stop him from getting away). 4) Start blasting Argoniel. 5) She becomes hostile and the "reached destination in time" event does not happen. My time counter is still running towards zero.

EDIT. Also, if I'm not completely mistaken, Argoniel now has Elandar's spellset with Essence of Speed and the like active.

EDIT 2. Elandar didn't teleport away either. He has the same spellset as Argoniel.

The situation resolved when the timer ran to zero. Wizards disappeared and the fire guardian was there. Failed the quest, naturally.