I kill ender dragon and before he die he shot a fire to me .So when it saw to me the animation of him dieing i die from his fire.Then i went back to the end from my spawn point i set near the portal and when i went back to collect my staff and the expirences that the ender dragon must have droped and i find nothing .Then I went to the portal on the end at least to collect the egg and the egg was not there.I think that the ender dragond bugged and do not drop any loot.