Confirmed the stealing theory. Got a unbugged save and after stealing and running the save was corromped.
Edit: Ignore it. Tryed it again and didn't crash. It isn't the stealing/running. Edit2: It only started here when I updated the 10MB hotfix. Game was normal before. Edit3(really): Save isn't corromped but now Fort Joy Square takes 1~2 minutos to load even without loading screens. Only walking around tankes more than 1 minute to load textures I guess?