I have had this problem a couple of times and each time I have forgotten about it. I die, I accidentally hit Exit instead of respawn, and then I rejoin the server. I'll then join back up with my friends and get regeared, and then when I log out again my character then is deleted. Basically the bug that I have seen is that if you die and then hit exit rather than respawn and then come back into a server and regear, that next character life will be deleted after you leave that server, and you will be a new spawn.