Last Exceptions After Loading Screens + Suspicious T-Posing Sims

Ever since I bought Lovestruck, High School Years, and Strangerville and removed the Better Exceptions mod from my game, I've noticed that sometimes, when I travel to a lot, there is a ridiculously long loading time and a random sim at the edge of the lot t-posing repeatedly. As a result, this gives me a last exception error. The last exception is also ridiculously big, at about 4K KB. When I plug the last exception into lastexception.com, there are piles and piles of unknown errors with no real answers. Can someone tell me what's going on?