Gameplay Bug:Slaying boss won't always count towards quest

[Arivred]

Version 1.5.80 on Steam
Levels: Desolation Desert,Scartree Forest and Hold
Reproducible:5/5 In the levels I mentioned
Current situation:I have to play the level again to finish the quest
Expected situation:Slay boss should count towards quest in the levels I mentioned
Desolation Desert as an example:Slay the Scartree Overseers before talking to Kanthara

https://www.youtube.com/watch?v=xq8SMDMKD44

[Wulfric]

For desolation desert, you need to be careful and do things in strict order. Speak to Kanthara, fight her bodyguards then speak to her again before going on to kill the overseers. Otherwise you are running the quest for a second time. Similar process for Scar Tree forest. On the plus side, you have got another star on the way to five starring all levels!