Was doing the boss fight in the Quandary pve. Took in Wiccan & Silver Surfer.
Used Black Hole on Quandary. She went away and a downed simulacrum with 22k hp appeared. Quandary was away, the simulacrum was downed (but showing full health), so neither were targettable. I systematically destroyed every column on the board with chain lightning, so there were no hidden tiles. Could not complete mission, had to retreat. She stayed "away" for over 30 turns.