Lava Falling Block dont show/render

i tried to spawn an FallingBlock with block water, thats my command:

/summon FallingSand ~ ~2 ~

{Motion:[0d,1d,0d],Time:1,Block:water,DropItem:0}

But the water FallingBlock dont show/render. I tried it with many other blocks.
Only lava and water dont render!

The little shadow of the block is shown by every try.