When a did /Kill @e the Enderdragon Did not Die

cannot confirm

I cannot reproduce this behavior. Can you do it again, or was it a one time thing?

I can do it again Heres a pick

There Hugs

does it produce an error somewhere?

Nope

Well I can do it and look at my game output

I cannot confirm, she dies when I execute the command

There was Nothing

Do

/kill @e[type=!Player]

Does it still not kill the ender dragon / Endermen?