When you summon an item with the summon command, you are not able to pick up that item. Even when you use the PickupDelay tag, it doesn't works.

What I expected to happen was...:
I summoned an item, and I could pick it up.

What actually happened was...:
The item gets summoned, but I can't pick it up.

Steps to Reproduce:
1. Type in this command:"/summon Item ~ ~ ~

2. You summoned an item. Try to pick it up.
3. You are not able to pick it up. (you can only kill it with a kill command, stand next to that item and type:"/kill @e[type=Item,r=3]")