I don't have the answer but I do have the exact same problem, and the same clue you have. The map crashes during the level_load. I tested the physics sample and it works fine. My game also works fine if I use the physics sample map and not my own. So there is something wrong in our custom maps. I rebuilt my map from scratch using the A8 WED but so far it has not fixed the problem. I will let you know if I find an answer.