Put the summary of the bug you're having here
What I expected to happen was...:
The Chest you dissapear and would break.
What actually happened was...:
The Chest reappeared as a "ghost" block and was not accessible.
(I tried out pushing pistons into it in the pics.
The enchantment bug is another thing already reported I think).
Steps to Reproduce:
1. Type "/setblock ~ ~ ~ chest" in a 2x2 square.
2. Destroy the left block in the back chest.
3. Destroy the block in front of that block (other double chest).
4. The first chest is a "ghost" block