So I was farming minotaurs at Artifact's Edge on Nessus and three goblins and one hobgoblin spawned above the lost sector like they always do. However, one of the goblins had a blue health bar instead of red, and he did not take any damage and was not attacking me. It was very similar to how Spider's fallen act while doing the Forsaken campaign, but it just didn't attack anything . Does anybody know why this occurred???
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Probably a bug, but it'd be cool if there were a lore reason for it.