Has anyone else experienced this? Just opened my MISB Assault on Hoth set (75098) and all the white bricks are yellowish. Set was purchased from Walmart online a few years ago and stored in pretty normal house conditions. I have only seen/read about white bricks yellowing due to exposure to sunlight, etc. This set was sealed. See attached photos of a couple of the bags, white printer paper included as a reference. Unless the bricks are supposed to be off-white? But the photo on the box is pretty bright white.