I had the same on my warrior for several days (on the same spot as yours) and it was bugging me. I tried to figure it out and then I got on my ranger to see if it’s on all characters. On my ranger the event was popping up at different location (see pic). When I logged out and back in it dissipated but it was at Divinity’s Reach Kormir Low road in the middle where i am at on mini map.
It must be some bug
