I created a new Ranger tonight and started with the river drake. Once I hit level 11, all of my pets got their skills unlocked as they should have except for my drake. The icon for Lightning Breath is just a gray box, and in the pet menu, both it and Chomp are missing. The same thing is occuring with the marsh drake I later tamed. All other pet species work fine. Relogging, closing the game, and swapping out the pets did not work. So drakes are basically useless now, which is bad, because drakes are my favorite pet.