/u/RiotExgeniar on the subreddit 2 months ago
Please take this as an acknowledgement of the bug from Riot. I've been trying to track this down for MONTHS. And, yes, I've read all the reports of this. The problem is, when a bug is reported with no actionable leads or reproduction steps, it's difficult to fix the issue. Not having an understanding of what causes this to happen, we can't safely fix the bug and we could end up breaking the ability more. League of a Legends is a widely played game, and we see 'one in a million' edge cases (like this bug) all the time, and it drives me crazy. If the community can come up with reliable reproduction steps to a major bug like this, I Garen-tee that the bug would be fixed within a patch or two. In terms of work around, I am currently working on an Azir refractor, so things are super busy. However, I have plans to look into this bug and find a way to hopefully avoid the issue the spell currently. (No eta) tl;dr: Here is your acknowledgement. This is a one-in-a-million bug; We don't have a reliable reproduction step, nor the understanding of the different variables involved, so we can't reliably know we fixed the issue when we attempt a fix.
Source:
https://www.reddit.com/r/leagueoflegends/comments/3g4646/gragas_has_a_champion_breaking_bug_that_is_being/
Honestly, Boards is filled with so many Riot haters I'm surprised they keep playing the game.
BTW, Gragas was picked again right after the remake :)
And if you're going to say "why didn't Riot disable him?" that's because Gragas was already played 24 games already in Worlds without any issues, so Riot made the call not to disable him.