The last time I saw anything pink in scenery was when I first installed the game in July on release. I went to my local airport - Glasgow to check it out and there were pink patches dotted all over the airport. At this point I hadn’t downloaded the world update for UK/Ireland (I didn’t think I needed to as I was just checking out the base game) but once I did install the world update the pink areas were no more. I’ve not seen any since either.