[BroZeus]

After some research I found out that the cause of it is in the OnGameModeExit, this is somehow caused when the code execution doesn't reaches the return 1; of the OnGameModeExit. Just put print("Game Mode EXit return one executing"); something like that just before return 1; of OnGameModeExit and see if that is printed or not.
If not then check for loops in OnGameGodeExit that is what causes it most of times.