Ideas
1.PC
2.With/ without mods
3. All save - all worlds
Okey, i copy my post from another topic
1. Save size does't matter - mine is 35-40MB, willfa13 - 75MB
2. Problems not start in Willow Creek - this is a coincidence. I never played in WC and I have this same issue
3. We both have custom lots from the gallery/made own.
4. Families and for rent lot:
On willfa13 saves everything worked fine until I placed TWO lots "for rent" (6 units/each)
The difference in our records is this she/he has lot of families and I have more for rent lots.
BUT in my game even if i put diffrent lot in empty lot "mystical cache" fill up and show default background lots. Solution for this is change ONE "for rent" lot into residential - same helps on willfa13 save too.
The second option is deleting homeless sims generated by the game or families which you don't play anymore - what is absurd because you want own lots and families in game!
I clean on few days homeless sims from save but i play legacy so the further the generation lasts, the more lots I have to set to residential - even clean homeless or ghosts sims stop helps.
https://drive.google.com/file/d/1_RLuDO6Z_0SsSMSHu_43Taz8ylHJ0Zu-/view?usp=sharing
Save is with bug. If you swap for rent to normal lot or delete families - it will work
https://www.youtube.com/watch?v=GgrbSr_TjmI - video with bug (even not "for rent" lot)