After sleeping in a bed, the player always spawns on top of it if there are no blocks next to it

The bug

If there are no blocks next to a bed, the player will always wake up on top of that bed after he slept in it.

To reproduce

1. Place a bed
2. Make sure there are no blocks next to it that could hinder spawning
3. Sleep in it
4. You spawn on top of the bed

Video

Minecraft 19w12b 2019-03-21 21_55_49.mp4