If I apply data tags to an item, and then drop it, the entity is not properly detected by using said data tags.

Example:
Item CMD:

 give @p stick 1 0 {display:{Name:Wand}}

Detection CMD:

scoreboard players set @e[type=Item] shouldkill 1 {Item:{display:{Name:Wand}}}

Based on past experience this should work, but after various tests I have determined this is a bug.