I just did this quest, he spawns up to the right when you are at the gate, at a platou with a small roof.
You also get a circle for him on your minimap, but no yellow dot.
It should whow horde symbol on the Kul Tiras map. There was one somewhere around this time becasue I was at the time in Tirisgarde Sound leveling alt. They usualy last 7 hours and when I was posting it’s remaining time was close to 1 hour and they happen in that general area where that quest mob is supposed to spawn.
I don’t know actualy. I wasn’t ever in the situation like this. I unlocked my world quest way before 8.1. Still I think only world quest shouldn’t be visible.