One lot keep crashing after last update

Hello,

Since the last update my Sims4 keep crashing in one specific lot. I tried following some tips to fix it and to find out if the problem is in the lot or in the family. Definitely the problem is in the lot. I have fixed it a couple of times but after a while it happens again. 

The crash is like, suddenly the screen freeze. I can still hear the music and the game noise as it playing in the background but the image is frozen. Other times it doesn't get to load in get stuck in the loading screen. It only happens with one lot, I can play other lots/families with no issues. 

I tried: 

- Moving the family out to a different lot and play with them. Works. 

- Go to a neighbour lot and pan in the direction of the faulty lot. Then move a new sim to the lot and play with it. Works. 

I have a MacBook Pro and no mods installed. The problematic lot is in Sulani Island and I don't have off the grid challenge. Do you have any idea of how to fix it??

Thanks!