Single-Player: No Mods
First time this happened - I have died before, respawned in my location without issue…
This time - I was stuck in my wall directly beside the edge of my bed.
What may cause this? Instead of having the head of the bed against the wall, the side is against the wall - perhaps it randomly spawns character to the foot, and either side of the bed… in this case, I was in the wall. (Sounds plausible, anyway)
Other than that, nothing extraordinary - it was night, NPC was chasing me down a hill, I kept jumping, and died by jumping, as my health was low. Woke up in the wall!