Dropping sand/gravel 1+ blocks above soul sand, breaks into items upon impact.

While gravity dropping sand and gravel above Soul Sand it will break instantly into a item in a player break block event style. Never seen this before 1.8 far as I know. And its not a serious bug more an annoyance as placing a sand/gravel block directly on top of soul sand will result in the block being placed and not broken but soon as gravity/physics gets involved it just self-implodes when it hits.

repo:
place soul sand, then a stack of 3+ blocks up next to it. attempt to place sand so it 'falls'. block will not land and dies back an 'item'