Sim households disappearing! (I have no mods)

Product: The Sims 4

Platform: PC

Which language are you playing the game in? 

English

How often does the bug occur? 

Often (50% - 99%)

What expansions, game packs, and stuff packs do you have installed? 

All (as of 09.10.2021) with latest update.

How can we find the bug ourselves?

I don't know, the bug occurs randomly when exiting a playable household and switching to another. Sometimes it occurs, sometimes it does not.

What happens when the bug occurs? 

A family disappears. Evicted from home. They are removed from the lineage as if dead. Because I have over 200 sims, I sometimes moved them to "unplayed household" but still leave them in their homes. It only happens to the "unplaced household sims". Never to the sims I leave in "played household".

What do you expect to see? 

My families stay there, in the property and I have no fear of them dissapearing when I play another household.

Have you installed any customization with the game, e.g. Custom Content or Mods? 

No, I have never used mods.

Did this issue appear after a specific patch or change you made to your system?

I have only just noticed it happening, probably sometime after Sims Country Living release.