Not necessarily a bug, more of an untouched issue. Airports can be seen through mountains, taxiways, and other airports. In your Image, you’re taxiing at KSEA (I assume), so you can see KBFI through the floor. Same issue in Hong Kong; you can see VHHX and VHHH through the many mountains surrounding the airports. I don’t believe there are any immediate plans to fix this as it isn’t a game-breaking problem per se, but more like something that isn’t urgent to be fixed.