This bug was gone for some time, or at least it seemed so, but after the latest update and after installing Get Together, it happens again. IT IS NOT "culling" issue, as all sims that disappeared from relationship list/tab are still in game, in fact, they are from my playable families. Game breaking, the members of the club are suddenly strangers to each other, and clubs are actually what we paid for in Get Together.
This is also happening to me, and nearly everyone else I talk to that plays in a rotational style. I have heard a few people say that it happened while playing one family, but I don't have personal experience with that.
I can say it happens to vanilla games, not only when I take all my mods out and start everything fresh (new folders, new download, etc), but to players that have never used a mod in their game, ever.
