This happened to me a couple of days ago, my sims were frozen and time kept going, I tried pausing the game, clicking the menu button a couple of times, and using the "reset sim" cheat on some sims. Eventually the game paused. I have not encountered this before so maybe this has something to do with the recent patch? (1.71.86.1020)
I was playing the Akiyama household at their house in MT. Komorebi and I was celebrating harvestfest and a bunch of gnomes spawned a lot of seeds and it was also raining outside. I was guessing it could maybe be my CPU so I checked my CPU activity but I think it was lower than 100% (100% means that the CPU is working a lot) I have a i7-4790K, 8 cores so it can usually handle the sims4 pretty well.
When I got control back to the game I removed the seeds and the gnomes and I have not encountered the bug again after that.
