Beds Unbreakable in Adventure Mode

Beds cannot be broken in adventure mode no matter what tool is used.

What I expected to happen was...:
Beds should be breakable by at least one of the tools.

What actually happened was...:
It couldn't be broken by a sword, axe, pickaxe, shovel, shears or bare hands.

Steps to Reproduce:
1. Place bed
2. Go into adventure mode
3. Try and break bed