For those with current versions on steam or switch owners, the treasure chest glitch of repeating rooms with a treasure chest and not killing one works for getting the task done. Just tried it myself and got the task
I have trouble on let them sleep cuz of the room with 5 patrollers + 2 in the down left and 2 in the right, that part is soo hard cuz i taunt but it activates or another does it 😭