Game Crashed For Entire Purple Team Blue Team Stayed in the ame and won

This is completely Confusing to me. Me and blitz were duoing bottom on skype when i stop moving as Draven and im the first one to notice, and I think it is a lag spike or something, then my friend says Its happening to me to. This is when i thought something was really wrong. Then Aatrox said something to the lines of "What the heck is going on" in chat. Then It slowly went through our entire team saying ______ Has left the game until im forced to exit and try to come back. When I come back I was in the stats screen and we had lost. This process was all in about 2 minutes in a fairly close game. Link to game http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1621556444/49279233 This is really confusing to me as it was in ranked and after it I lost 17 lp because of this, and I can't report Riot in the after Game screen.