devtrackers.gg
We’ve been trying to figure out this elusive bug for months now, and it was your comment that led us to the root cause. In particular, the combination of how the tracking would drop for people part way into the fight while others recommended interrupting all of the knockbacks to receive quest credit seemed bizarre but led us down the right path.
Under the hood, world quests are pushed to your log when you enter a volume attached to the target creature. We use these volumes for combat as well; things like movement forces, damage areas, etc. In this case, the creature got a little aggressive cleaning up its volumes after finishing its knockback attack and would continually wipe the one that maintained the world quest credit. We also found a few other creatures that were misbehaving in this way, so we were able to repair them as well. Your world quest credit volume should now be immune to knockbacks. We aim to have this issue hotfixed in the near future so keep an eye on our official hotfix updates for when it is live.
Thank you for helping us make the game better,
The WoW Engineering Team