I'm trying out a build with the new Retaliation skill.
When Gawin teleports you, it causes damage to you. Retaliation damages him back, causes him to take -20 attitude towards you, and immediately starts a battle with Gawin. This prevents his quest from advancing.
Fleeing does not allow you to progress the quest.
It's possible this issue might be present in other quests in the game, in any similar situation where they do something that damages you.
Last edited by Incendax; 05/09/17 09:39 PM.