This has happened twice now, in remote locations, low server population (2 other players, very unlikely I was killed.) The only thing I can think of is that I spawned above the ground, and fell.
Please fix this. I've died in this game at least 8 times, only 3 have been legitimately from other players/environment. To spend hours/days gearing, and for this to happen is definitely game breaking; and will totally discourage people from playing.