So you just have a level (testing one) which is fully made of models and without any actions assigned (just some models placed in WED). And after removing all actions from those models/sprites it still crashes, but when you change order of those models the crash is gone? If you wait for 5 seconds before and after loading level, crash is gone too, am I right? Do you have anykind of loop/looops where you controll entities? F.e. I had script where all door where controlled in one loop, do you have anything like that? Maybe that 'loop' is trying to access a pointer (pointers) that doesn't exist yet, so that's why 5 seconds delay helped. Changing the order could help, so you move model (models) that caused the crash up in the WED list. Anyway, if you have a crash on loading a level made of models without any actions assighed, this is strange.. A

Edit: it's really hard trying to 'guess' what causes the crash, without knowing how your setup of the game looks like.