Just played my game after a few days of not playing. I did get the latest updates and package (the small pets thing), opened my most recent save. Boom, apartment items missing, including the urn of my sim's deceased husband; to be honest, I probably wouldn't have cared as much if that item wasn't missing. Granted, it still sucks either way, but it's not like I can get the urn back, so that makes it worse. And just like @simmytime, it's that apartment complex AND the Medina Studios apartments. The other ones seem ok or relatively minimal...I think.
The only way I can save this is if I go waaaay back a save, but even then it doesn't matter because as soon as I try a different (apartment) household, the items disappear again.
Again, it's bad enough that the items go missing in the first place, but it's so much worse when items that CAN'T be replaced go missing. For those who don't catch it and save, this is going to be a super heartbreaking bug for them.
FYI, no mods or cc. Only packages.
Forgot to mention that I tried repairing the game, too. As much as I want to continue playing, with this bug in effect it's not worth it.
@LuciferVArtist- I don't think it happens if you don't save. Or that didn't happen to me. I have multiple saves (after having this game screw up on me so many times, I don't take anymore chances), and when I caught the missing items, I immediately closed out and reopened the game. When I played again, things were there. Once I left again, they were gone again. So I think you're safe as long as you don't save.