unfortunately I didn't took a screenshot of this,
but I was mining an underground tunnel and found out alot of stone and dirt floating on the ground above the tunnel. about 10-7 blocks high then where I was mining.
More then that, i found out that when i break hoppers they sometimes spawn 5-4 blocks away and even spawn behind the wall if you break it next to a wall.
this is happening on server, not SP.
Duplicate of MC-47650 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.