The bug

If you sleep in a bed and it is broken, you are supposed to be sent to the world spawn. However, if you break and replace the bed, you respawn at the bed again.

To reproduce

1. Place a bed far away from world spawn
2. Sleep in it
3. Break it
4. Place it again at the same location
5. Run /kill @s
   → You respawn at the bed, not at world spawn