In 0.17.1 beta (aka 1.0.0) in the creative menu the dragon appears invisible, i have attached an image for proof that this glitch is real
Update by @unknown
This bug affects all heads (Steve, Creeper, Zombie, Wither Skeleton, Skeleton and Dragon Head).
This bug has been reported to our internal bug tracker for further testing and a fix. It is scheduled to be fixed in one of the future updates (no specific date can be provided).
Please do not mark unreleased versions as affected.
You don't have access to them yet.