[CLIENT?] Disappearance of ONE Match History

My match history usually shows up fine, but recently one game (yes, only ONE) disappeared from my match history.

The date is March 17th, it was a game with Ashe and it was quite an AWESOME win (we were at a great disadvantage but won in the end, with KDA somewhere around 27/10/34 and gameplay around 1hr). I was anticipating to see the match stats, but no match history showed up until now.

Has similar problems happened with other players recently? Or specifically on March 17th?