Second time it’s happened. There are 5/6 of the stolen golems recovered. The last one appears, you fight it and it’s supposed to turn friendly and return to the Luminates plant. It dies instead. A minute or so later, the stolen golem reappears, and you can kill it again.
But there are never ending waves of Inquest at the front door, so if you’re looking for that then… yay?
(p.s. Almost positive that this bug has been reported before on the forum, but the search turned up nothing for “LUM009”, “golem”, and only one result for “Metrica”)