Hmm had some strange quests resolve in my face, with unexpected sudden combats with no dialogue attached to them, so I would just wish for a proper way to "complain" about these things .

Can't say I would know what happened to you though, not a lot of explanation here

(With complain I mean I want a way, proper way, I feel comfortable about, that I can communicate to the support team what quest the bug happened, in what sequence, and all the other bits).

Sincerely
~ Kongdej

The one where you first defeat a troll on the quest location, then you get the reward when moving on the quest location, then a fight is triggered against the tough bandit, bear, Ritualist (or whatever they are called) and the guy who heals himself with poison damage all the time, you get the reward just for visiting the quest location, even if you lose the spawned battle.