all blocks was summoned simultaneously, and at the same height. Therefore all four blocks should be visible in the picture, but they aren't. Tho all blocks are visible when they land on the ground.
you should update the description and add chest, trapped chest and ender chest.
And add 14w32d to affected versions.
I tested to summon falling sand in 14w32d with the folowing "Block" tags:
chest
trapped_chest
ender_chest
water
lava
standing_sign
wall_sign
standing_banner
wall_banner
all of them were invisible untill they landed on the ground.
Comfired in 14w32d with folowing comand:
/summon FallingSand ~ ~10 ~ {Time:1,Block:minecraft:leaves,Data:0}