[Gameplay][Client] LP not granted after ranked win

This game is what will be referenced for this post.

Loading into the lobby for this game, my ADC reports that he is unable to select a second summoner spell - unrelated to the issue I experienced, but it could provide more information for the rest of the problem.

After the completion of the game, we are stuck at the "Skip Waiting for Stats" button. After a few minutes of waiting for the stat screen to appear, I skip it. The match appears in my match history and on op.gg, but the players did not appear in my Recently Played list, nor was I granted LP for my win. I put in a support ticket and was told that this issue could be just a delay, and that after a few games it should sort itself out. I was also told that if the issue did not correct itself to submit a post here. Since then, I have played 4 games, 3 of which were ranked games. LP gains/losses worked normally for those games, but the LP from the aforementioned game still has not appeared that I can see.