Thanks for the info guys. The front cap does get the worst of the sun in the afternoon, though the trailer overall does get a pretty good dose of sun throughout the day. Its weird that's its only these 2 stickers that are the same that are failing. The rest of the stickers on the cap and the rest of the trailer for that matter are still in great shape. Maybe the clock is ticking on the rest.
I have seen the sun fade, crack, and lift up stickers, but I had never seen them turn colors like this because of the sun. Could be a bad batch I suppose.