I try the new version on Minecraft (1.9), and when i'm on the end, after killing the enderdragon, I see the earth and grass in the end.
http://prnt.sc/ab9r7o
I say clearly that I did not put any block in a vacuum, and the more stranger, when I begin to write this beug, another block (of grass) appeared
http://prnt.sc/ab9t3f
I really think this is a weird bug, because when I go to the end, then when I turn around, the blocks disappear, and other blocks appear.
http://prnt.sc/ab9ys9
http://prnt.sc/aba06d

I clearly say that it's not a joke,
I don't know if you can try this, but the seed is
-4778233723208650275

Sorry if my english is bad, it's because i'm not english