so, i just finished Nadia's side quest "Sex Ed" where we look for clue for his brother Isaac location on locker, after the quest is completed there is a scene with Nadia, but somehow the quest just keep uncompleted and stays in quest journal and also Meredith and Jenny gone missing in my game after the scene, can someone help pls :D

they gone missing in morning, midday, and evening, but in night and midnight its just normal, is this a bug? or  its just my save that corrupted?

i have also tried to repeat the quest, but when i return to the school with Nadia its like the quest is already completed, the pool boss not spawning, and the locker cannot be interacted