never had it happen myself. I can only suggest that you have a bad mod causing the issue
The other thing you may have to do is start with no mods (except any required by the map). Play for a bit, and see if it crashes, if no, enable half your mods, try again. Rinse/repeat, enabling/disabling mods in small chunks until you locate the culprit. It's annoying, but sometimes it's the only real way to know for sure.
Best of luck