Ranked low LP win bug

Hello, I was playing some ranked games and on my wins I was usually getting around 20-24 points per win after a game, but in my last won game, out of a sudden I got an error saying that I was removed from the party (I was playing solo) and got only 11 LP. Apparently a player from the game said that he also got a small amount of points. Do you have any ideas why?
Report as:
Offensive Spam Harassment Incorrect Board