People have been reporting the event for a very long time now, since Korthia, where it permanently bugs out getting ‘stuck’ on “Defeat the Gorged Shadehound 0/1” for the remainder of the week.
For a rotational event every 2 weeks to a single attempt, this is beyond ridiculous…
Apparently it’s due to people using the Korthia skip.
Great that Blizzard can’t be bothered to fix bugs in ‘irrelevant’ [old] content.