Fabled Automation Bishop not in Arena in Swamp Gauntlet Realm.

In the Gauntlet swamp realm, i'm in the arena where this video shows the Fabled Automation Bishop as being:

https://youtu.be/abLLNS2vKNk?t=131

But for me there is nothing here, no bishop, no automation storage pillar and no glowing red magic thing.

I'll attach a screenshot so you can see the issue.

Before visiting the arena i first fully explored the realm and cleared all the infestations, bastilles of intellect and those type of things, which i did over a few sessions. So the game has been exited and reloaded many times on this realm before i eventually entered the arena - perhaps that has something to do with it?

EDIT: Resetting the realm fixed the issue - after loading into the new realm i went directly to the arena and there he was.