When you break the block a new door is on, the item dropped is always the old wooden door

Summary
When you break the block under a new door, the item dropped is always the old wooden door.

What I thought should happen
I thought that the item dropped would be whichever door was on the block.

What actually happened
The item that dropped was the old wooden door (oak).

Steps to Reproduce:
1. Put one of the new doors on a block
2. Break the block that the new door is on