Noted, I'll have to fix it on the mod end I think. In the meantime you might have to delete your player save data, it's in the world folder called morph_save.dat. If on multiplayer you might need to get an NBT editor to remove specifically your save data in the file as to not affect others. I don't know if there is a /morph morph clear command but if there is you can use that, it'll clear your morphs. If it doesn't, then, uh I should probably add that.