That bug happens when people died while they DC'ed. I think SSG can investigate their logs and see who died after DC'ed. SSG will be able to put their life back once they found out who died after DC'ed.
Also, they can put a fix that when a player died after DC'ed and their life stack is above 2, giving them a stack of life back. simple, I guess? It prevents double death at least, while It doesn't prevent one death after DC'ed.