No need for sarcasm. i looked at the script on this also. The hanger doors are meant to open when the snow troopers with heavy gun get shot. In fact they were meant to be in between the falcon and the way out of the hanger. the door was meant to be behind them opening as they get shot.

So also for some reason the angle and position of the intended shot changed for some reason.

This is also a shame that it was not like this. did the door break or something? Or are we seeing an alternate angle I wonder.