Stormbluff server is also having this issue. Knocking on the Door is looping in Queensdale from Detti to Thiago.
After reading this thread, I went searching for a haunted door and found a door bugged open between Hunted Lodge POI and Krytan WP. We tried to open it or enter through it. It would not allow entry but spawns several spiders endlessly and remains open.
All three areas in Stormbluff are bugged. Events are looping in Gendarren and Kessex.
Submitted a Bug Report, but posting here as well that the Event is looping in Queensdale on Stombluff Isle.