Blood Warren not working

Pannya

So i was playing Doctor in the new map of Silent Hill DLC and at the endgame collapse i hook somebody, and the timer of blood warren started. So i follow this survivor until he reach the gate (blood warren was in the middle yet, 30 seconds maybe being activated) and the survivor just... escape, even tho the walls of the entity appeared and the character didn't left the map, but the game ended and he escape