Blizzard are talking about the issue some players are having with their Hall of Fame slot and achievement.
It seems there’s an issue preventing a certain number of players from getting their Hall of Fame achievement, and Blizzard can’t fix it. To get it, those players will have to re-clear One-Armed Bandit and Mug’Zee again on Mythic.
We recently fixed an issue with the awarding of the Hall of Fame achievement for Liberation of Undermine. However, we have a lingering issue preventing us from awarding the Hall of Fame to some groups of Mythic raiders who had already killed One-Armed Bandit and Mug’Zee, Heads of Security and subsequently killed Gallywix.
For players who are in that state, the only way to earn their Hall of Fame achievement will be to re-clear the Bandit and Mug’Zee encounters on Mythic difficulty.
Thank you!