You can make fake double chests.
This bug only works when facing east.
Steps to make a fake double chest:
1. Place a double chest facing east.
2. Place a double chest on the east side of the chest using command.

/setblock ~ ~ ~ chest

3. Break any side of the double chest you first placed.
After you make fake chests, You can find more bugs.
1. Re-enter the bug test world, nothing changed.
2. Right-click on the invisible chest, the fake chest has the opening animation.
3. Try facing other directions, will make an "L chest"
4. You can walk into the fake chest, or place blocks inside the fake chest.