grade won't load

as the title suggests, after the game is finished, noones grade will load. It happens 2 times now, both games when i was playing as nocturne, so i suspect that you can reproduce this bug by just playing nocturne. (yes i did played other champs, no bugs then.) Both games were in 3v3 (twisted treeline)

really annoying since im trying to get a hextech chest but since the grade wont load, you also wont ever get a chest for it. :/

edit: looks like it's not just noc, got it with other champs now too, i guess it was just a coincidence that both other games were with noc.