Did a search and clostest thing was the items walking through walls but with this they aren't walking through wall it is more to do when just picking items up off the grond. They seam to sink into it when you pick them up instead of going up towards the players view. They are getting picked up just going the wrong direction. May be related to hovering above beds when you sleep in them but not sure.
MC-48297
Items being picked up 2 blocks below
Resolved
Duplicate
0
Th3F4114n0n3
(Unassigned)
Unconfirmed
Minecraft 14w06b
Retrieved
I normally don't but I do question this as being a duplicate of the above mentioned bug. This isn't that the items are walking through blocks. Its when they are sitting on the surface of a block the animation of them getting picked up is shown going to a point that is approximately 2 blocks below the player. They are still getting picked up they just gravitate in the wrong direction