[GAMEPLAY] I somehow killed my teammate

When Gragas died, I somehow got the kill for it as his teammate, despite not even hitting him once. This includes getting the gold for the kill and Syndra getting the assist for killing Gragas. However, checking the scoreboard reveals that although Gragas died and Syndra gets the assist, Twisted Fate's score remains the same.

The match history also shows some unusual quirks. Although I have 8 kills, the match history kill map shows that I had nine, with the teamkill on Gragas being a blue dot despite being on the red team.The team gold advantage also shows Twisted Fate killing Gragas on the blue side of the graph.

As far as reproduction goes, I really have no idea what to do. Something strange to note is that in game the death announcement was something like 'game_announcer_twistedfate has slain..." whereas in the replay from spectator client it states "VG Aeternus has slain..."