Item Duplication Glitch

This is a bug that has been in the game for a while, that I thought would have been fixed by now. Basically if you set up a sticky piston like shown and put an item in the chest, it can be duplicated. How it works is

1. Place item in chest
2. Activate sticky piston
3. While the chest is activated, pull out the item quickly and place it in your inventory (or use shift click) right before the chest is pulled back down
4. The item you have pulled out will be in your inventory, while still being in the chest, effectively doubling or "duping" said item.