Don't know for sure. I came back to the game with the previous update, restarted and after a long part of the game being, I would say "normal". It's be month so I can confuse with other another games, but from memory a guy came to threaten everyone, then it's free roaming in the house, with nothing to do except the diner full of "will come next". Then the next in game day when I tried to see if I could exist the house they decided to go to the SPA, and never ever came back.
It seem to from season 3 since I was able to load the save and play it without problem.
I was even able to load a save made prior to this, hopping that the current update would fix the issue, but it lead to the same behavior. They goes to the SPA, and never ever come back.