Had the same issue. What I did to fix it was fast travel to the foward station right in front of the quest, saved the game, swapped out 1 party member, ran over to where the architect was and then reloaded the saved that I had created. When I loaded it up I heard Drack say something about the fight and walked over the that area and it finally came down to fight me. Hope the helps/works for you.
Glad to hear you found a workaround, I will try this when I get home tonight and report back. Fingers crossed !
So I managed to get through this, I ended up leaving the planet and doing missions on another planet for the rest of the day, I came back on today and traveled back to Elaaden and was now able to engage the architect in combat.
Anyone having this problem I would advise leaving it for a while and coming back to the planet later after completing some other missions. Either that or keep trying to leave the planet and going back
