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?
yes.
If you wait for 5 seconds before and after loading level, crash is gone too, am I right?
no.
The 5-seconds helped only when I load the levels "outside" of the game. I used a simple main function that does nothing but loading the levels one after the other. Even a wait(1) is ok in this case.