I spend the last 5 days (about 2 hours a day) searching for that freaking bug. Mine also performed well in developement mode, but crashed when published. I don´t know why, but I had a lot of ent_create, ent_preload and ent_remove calls one after the other. Putting wait´s between the ent_create and preloads solved it somehow.

You´ll need a lot of patience! Best of luck!