You do this when you place a block and you close and restart the app. Then it gives you the block you placed in your inventory. And the block that you placed is still were you left it. (Try it a couple of times because you have to do it a certain way)

What I expected to happened was...:
The block should appear where you left it.

What actually happened was...:
Appeared where you left it and also in you inventory. So you now have 2 in your in your inventory and then 1 more on the ground were you left it.

Steps to Reproduce:
1. First place any block on the ground (diamond or gold block recommended)
2. Close and restart the app
3. You now have 2 in your in your inventory and then 1 more on the ground were you left it.