Another thing about the glitch I realized is that even dead sims vanish. What I mean by that is, the grey boxes that appears in the relationship panel which shows dead sims, they also disappear, and when you hover over a disappeared dead sim's grave, it says: _____ lies here, and it doesn't say the sim's name. Same with food and drinks made by sims that vanished. I currently have a family of 6 sims living in a mansion. I want to move some of them out, because the house is getting crowded, and I still want to make the family bigger, but if I move them into another house, they will vanish like the rest of the unplayed households do. Another thing I realized is that if you meet sims on a community lot, or any lot, as soon as they leave the lot, or you leave the lot, they vanish from the relationship panel and from the world.Amazingly, 2 of my other sims lives in 2 different houses, and they haven't vanished yet. I won't play them though, because then I'm risking the mansion's sims vanishing. I hope there's a patch coming soon to fix the issue, because there is no more space for sims in the mansion, and my sims need to make friends to get promotions, which is impossible if sims keep disappearing.