X-ray glitch when in a composter with a solid block above

How to replicate:

1. Place a wall that goes 2 blocks above the composter. (Make sure there is a block under the composter.)
2. Fall into the composter
3. Place sand (Gravel and Concrete Power might work. Haven't tested it yet.) on the top block of the wall.
4. Let it fall on top of the composter. (This will cause you to sink into the block under with your torso still being in the composter. When in F5/Inventory your character is laying down.)
5. Look down. (You will see mobs and minecarts. No blocks at all.)
6. To get out just look up and destroy the sand.

I haven't tried other blocks getting pushed into the character with pistons or anything. I'll leave that up to the devs.+

 

EDIT: I tried it with pistons and it indeed works.

It also seems that the more blocks that are head-level to your character the bigger the gap is. (As seen in the new pictures below.)

The blocks have to be directly connected for it to work.