Pathing Kaesora - Library Spider Pather

[Idgaf174]

While near the Library recently, I have noticed a random spider that appears to path through this area. I see him roughly once per hour - hour and a half. None of the youtube videos I have seen where others have been at this camp seem to have this spider appear.

I have asked my guilds and no one remembers there being a spider here. Most of the times I have seen this mob it just kind of appears on top of me attacking me (hence no video of that). Also, most of the time he seems to be near the wall walking back up towards the top of the dungeon, making me assume he fell through the floor and is walking back to where he should be.

The time I got him on video however, he was walking the other way into the library. Attempted to add video but kept getting an error saying missing security token so screenshot instead.