I make my sims in CAS and they are fine but as soon as I move them onto a lot, their faces change and become all stretched and stuff. Any ideas on how to fix the problem?

My game has been crashing recently for some reason I can't place. It's crashing even when I disable custom content. I did a full uninstall reinstall and deleted all my hacks. I have no idea what may be causing it or how to fix it. Any suggestions would be much appreciated. Thanks!