If you do what I do, which is to quit after each stage and restart the game and level I was on with mission replay, then you would see that it is not level specific. I can play every single stage and never get the glitch, but only with the method I just described. If I play a few stages continuously, doesn't matter which, the glitch will eventually show up at a completely random moment. It is NOT stage or event specific. I hope this helps Cry-Adam.