What I expected to happen was...:
Chest should open if slab is on top of it

What actually happened was...:
Chest didn't open if slab is on top of it (downer position, in older versions everything worked perfetly)

Steps to Reproduce:
1.place a chest
2.put slab (any kind) on top of chest (chest opens if slab is in upper position)
3. try to open the chest