This isn't a big issue. A lot of the textures loaded onto objects that are placed into the map used for the Spartan Ops mission Guardian in Chapter 2 episode 2 are corrupt right now. Some of that interact with objects turn either a bright white or extremely dark black at a few feet away and whenever you get close to them later to a bright green object. Some things don't even have textures that should correlate with the object like a UNSC box skin on a touchpad. Others just look more like corrupt Mouse overlays for some of the Forerunner gun stashes.
Yes, this happens sometimes. Usually, you can fix this "issue" by restarting the mission.
Though you shouldn't have to