I already posted this on the discussion sub-forum, but as I got indicated it was probably a bug, I'm reposting it here :
After killing Vicross at her estate, I fought Szass Tam and brought him near death quickly. He then offered to send me back, but I refused, he killed me and I loaded my save. The second time, I brought him near death quickly again and he then sent me back in the clearing without giving me the choice. I don't know if that is a bug or not.
Now, my real issue is that nothing is happening since then, Neera didn't say anything and the quest is not done in the quest log. I guess a dialog didn't kick off at that moment. Now, I've got no way to go back before the fight, I overwrote my save before realizing there was probably a problem. Would there be any way for me to fix this?