Pick Block on placed Shulker Boxes gives different item than found in the creative inventory

Steps to reproduce:

• Take Shulker Box from the creative inventory

• Place the Shulker Box

• Use Pick Block on it
  You are given a new item.

The following is the item NBT of both items:

• From creative inventory:

  {Item:{id:"minecraft:shulker_box",Count:1b,tag:{BlockEntityTag:{Color:10b}},Damage:0s}}

• From using Pick Block:

  {Item:{id:"minecraft:shulker_box",Count:1b,tag:{BlockEntityTag:{Color:10b,Items:[]}},Damage:0s}}