I also got disconnected right now in a ranked game I was winning.
Game disconnected and was blocked with trying to reconnect status. I checked internet connection and is working correctly so I closed the game after waiting a while and enter again, showed me message that the game I was in is still in progress. I clicked rejoin, the game says there was an error so I couldn´t rejoin.
Game is lost in my history.
Thank you blizzard.