Since the 30th anniversary update there has been a lighting bug. Every now and again in all activities the lighting will bug out and all shadows will disappear. Sometimes it will fix itself but most times it won't and the only way to fix it is to go into your menu and come out again and hope it fixes because if it doesn't you will have keep going into your menu until it does fix itself. In the seraph shield mission after the space walk at the area with the two ogres there is a big pipe in the middle of the room. The bug happens almost every time at that specific location and makes the whole room "flash" and it looks like someone is messing with a light switch. I have linked a small video of it happening to me in different areas of the game. Most of the clips were gathered in one day.