Riot Games put a 2015 League of Legends World Championships match on hold because of a "game-altering" bug that affected one of the players' Q key. After determining that it was an extremely rare glitch on the game's side and not because of hardware malfunction, Riot offered the European team Fnatic a remake, which the team, of course, accepted.
The bug revealed itself during the second match of the day between Fnatic and Edward Gaming (EDG), and the affected champion is none other than the ale-guzzling, barrel-throwing Gragas, the rabble rouser. On the 20-minute mark, Fnatic member Reignover noticed that Gragas' bread-and-butter skill won't work, causing the technical team to rush over to his station.
Even though Gragas is susceptible to such a game-altering bug, Riot decided that the chances of it happening again was too small and that the champion was too popular in the 5.18 patch used in the World Championships to be immediately disabled, so the champion remained playable for the tournament; however, the decision was short-lived, as Riot eventually disabled the champion as well as Lux and Ziggs after finding out how the bug occurred.
"Having looked into this further and isolated the cause, we now know the bug is more likely to recur than we initially thought. We don't want to endanger the integrity of the upcoming games or risk additional remakes, so we are are disabling Gragas for the remainder of the tournament. The bug is also reproducible on Lux and Ziggs, and so to be safe, we are disabling them for the remainder of the tournament," Riot posted on the League of Legends Esports site.
On the remake match, Reignover still chose Gragas as his champion, but fortunately, the bug didn't occur then.
The battle between the two professional teams came to an end with Fnatic as the victor. Despite being one of the expected winners in the 2015 League of Legends World Championships, EDG just couldn't beat the European powerhouse. But EDG didn't play poorly on any account; it's just that Fnatic played better.
— LoL Esports #Worlds (@lolesports) October 17, 2015