Since the Update Aquatic Part 1, The Norse Mythology and the new Egyptian Mythology Mashup packs are having some issue on their mob heads and ender dragon textures. There is no conflicting texture packs that caused this and this is what pops up whenever I open Minecraft or restart it. The creeper and ender dragon mob heads from the Egyptian Mythology (models are fine). The ender dragon mob head and model from Norse Mythology.