Holding down Shift, then clicking "Destroy Item" will not clear the creative backpack item

Holding down Shift, then clicking "Destroy Item" will not clear the creative backpack item

What I expected to happen was...:
Holding down Shift, then clicking "Destroy Item" will clear the creative backpack item

Steps to Reproduce:
1.Put some items in your creative backpack
2. Hold down the Shift key and click "Destroy Item"
3. The contents of the backpack have not been emptied