YorksRob Then I think this belongs in the bug report for the issue. Feel free to add any other info you think is relevant.
Further testing it definitely happens when a sims goes to sit down (yours or a townie) also sims often get stuck by the side of a bed when they get up and have to be reset to get them to move at all . Then moved a few spaces away from the bed before you can set them a task IE go to eat etc
If you play via Steam, try unlinking Steam from the EA App then install all packs directly via the EA App. The issue may have been related to the Steam/EA App connection. It worked for me!
Link to my thread of what I tried beforehand: https://forums.ea.com/discussions/the-sims-4-technical-issues-pc-en/corrupted-game-after-downloading-mods/12607231/replies/12708565
