If you recruit Glut and kill the Druegar boss (the one ressurecting the dead) by shoving him into the lake and killing him instantly Glut will afterwards always insist on having "to see it himself" when telling him you killed them all.
Here you can see the entry in the journal
https://imgur.com/a/zZiakoV I am okay with getting no loot from the Druegar since I cheesed the encounter but the quest should still be resolved.
