No loss prevented?

Me and a random in my solo/duo queue game both d/ced at the same exact time. The gyazo i posted is what was what the league client was frozen on. I would restart the client to try and see if that was the issue, but I would have the same authenticating error. We were not able to reconnect for 8 minutes but by then the game was already almost over. When I reconnected the Darius reconnected at the exact same moment. We were pretty far ahead and its just annoying when we lose for no reason other than a server issue. But why didn't everyone d/c, and why only the two on my team? Does league even do loss prevented anymore?