The Battle for Wychmire Swamp - QoL Change
This is true for a few other events as well.
Commissar.
Maw. Thanks to the kill credit bug (You have to be one of the first to deal damage.)
Karka. Again, thanks to the kill credit bug.
An adjustment would be great.
^ Uses Guild Wars 2 character screenshots for desktop wallpapers.
Those avatars have an extra bug where even if you get credit and the drops the loot can despawn in about 1 second. You can also end up without getting credit for the event if you get enough credit to get all the champ bags.