Loss Prevented in Rankeds

So... I decided to play my 10 ranked games. with 4 of my friends, 5 premade We got into the game, and around the minute 25 there was a big teamfight mid. And suddenly we all got "Attempting to reconnect". We lost that teamfight and the game. It shows "Loss Prevented", but it shows that I have 1 lost. I wanted to win all 10 games, but now my dream is ruined ;-;