Character's/Entities turning Pink In-game & in Character Creator

There's a visual bug that I have just found where skins turn pink in-game and in the Character Creator screen. I don't think this weird glitch effects custom skins, but effects the Persona skins: "4D Geometry Skins", Steve, Alex. Capes are also pink, and your own skin is pink, but only in the Character Creator screen (Also on Pause Menu & Main Menu). Your skin appears broken on Inventory Screen, and the little Doll in the top left. Also entities turn pink. I have also noticed that when you leave the server and rejoin, the Persona Skins go back to normal, but your skin remains broken (Just on GUIs). Just a weird visual glitch I came across from, but I thought it was kind of funny to see. I'm not sure if this is to do with the new Render Dragon Engine.