I died and pressed re spawn I had the chunks loaded of both my bed and my death site while i respond and died. I came for nearby chunks in a square have been x-ray glitched. It was still solid ground. 

How to reproduce:

1. prepare a house and a death site nearby (~9 chunks) I recommend fall damage. The house must have a bed and must not have corner missing (i dont know it you really need it) the house should have windows but land that blocks the death site.
2. put some items on you
3. die
4. see the glitch (it could take a lot of tries and items)

(!)please make a backup of the worlds that took you a long time. Do not use hardcore mode. 

EDIT: It can be fixed by reloading chunks