In one of my games (I do not know if it is only one) my opponent resigned a game and I have not received any message, and there was no ranking evaluation. I just started to search this game in my game list and I could not find it. It occurred that it is finished.
I am sure this is related to the negative time in some games. One of my opponents now at -56 hours. I also just checked and vacation days have been reset. I wonder if this is also due to the SYSTEM crash?