Ender Dragon ignores CustomName

Some mobs like the EnderDragon and the EnderCrystals does ignore some DataTags like the "Invisible" and the "NoAI". i tried to make an stopped EnderDragon doing the command

/summon EnderDragon ~ ~ ~ {Invisible:1,NoAI:1,CustomName:"a dragon",CustomNameVisible:1}

the result was that the enderdragon did not became invisible, he can still fly arround, and the name was not changed