#1 - June 18, 2020, 6:39 p.m.
Blizzard Post

Thank you to everyone who reported issues with completing the Legendary Quest for the new adventure. For players who completed the adventure shortly after it was released, it’s possible that you didn’t yet have the Legendary Quest and won’t be able to complete it with repeated playthroughs. We’re working on a fix that will check for adventure completion and whether you’ve gotten your rewards and grant quest completion to anyone who didn’t receive it. You will not need to complete the adventure again as long as you have completed it once. We’re likely going to get this fix out early next week.