(Brief aside: Hi Waffle! I love your mods/Waffle Explains It series! They’re so helpful.)
Just to make sure I understand, the way you’re saying it’s supposed to work is:
Sim A is actively cooking dinner and queued to vacuum, refill the dog bowl, etc. when I exit the game/live mode and go into build buy. When I resume things, Sim A should still be cooking (though the other tasks may be gone).
If I have it right, that makes sense! I do use mods, and I can try to filter out and test the ones that change zone behaviors. However, I noticed the OPs in the thread I linked and the offsets from there had the same issue even without mods, and I can’t seem to find the ultimate resolution. The trail just kind of…stops.