FallingSand with Spawner (when it spawn on the ground) don't work at 1.8+

/setblock ~1 ~ ~ minecraft:mob_spawner 0 destroy {EntityId:"FallingSand", SpawnCount:1, Delay:10,SpawnRange:0, MaxNearbyEntities:1, MinSpawnDelay:3, MaxSpawnDelay:10, RequiredPlayerRange:5,SpawnPotentials:[{Type:FallingSand,Weight:950,Properties:{Time:200,DropItem:0,Pos:[-218.5,4.0,1082.5]}}]}

This commands works in 1.7.10, and not works in 1.8+.
This bugs makes that impossible to create fast/compact mining spawner.

This world(New World, 1.8+) will be proof.