I have come across another bug: After Lust Doll impregnated Cassie, she went on a trip and the animation of her returning played the next day but the npc box never came back. Way too much time has passed and she isn't in any of her usual places. She can be found in the island but that's different. This has locked the final stage for Gin and I am guessing the same will happen with bandit girl's route(can't remember name)
This happened after I competed all the quests including Cassie, but not immediately after, so I guess it isnt related with that