[DU] [HSY] Issues with Cafeteria workers at Uni & School

After the patch/new update my other sim went to U. Everything seem like it's fix. But on the 3rd day it happen again. So this time instead of changing the lot to Foxbury and back I switch to Residential. Previously when I switch to Foxbury and back it fix the issue but NPC students still spawn but not as many. I didn't had the time to test further as my previous sim had only few days left in U. So this time I on 3rd day it happen again so I send my sim to another lot and go to manage world, change the lot type from Britechester commons to Residential instead to Foxbury. Went back to my sim and let it run for few seconds then go back and change back to Britechester Commons. This time after doing the lot change, there's no more NPCs spawning when you arrive at  the commons. My sims still have 3 more weeks in U to test out but so far after 3 days everything still working fine. Maybe others can try out this method