Did not gain LP for ranked win

Hi, I just won a ranked game then clicked victory button and game crashed. I tried logging on but couldnt for about half an hour. When I got on i found that my win is in my match history but my LP is still 11 on my profile. It was 11 before the win and having 11 LP after a win does not really make sense unless I had negative LP or absolutely garbage mmr. neither did i have.

EDIT: i got in touch with one of my teammates and they didn't gain LP either! also noticed that we didnt receive a letter grade after the game or xp.