I just did the fragmented sword quest for the first time and had some trouble controlling my summon and cohort. They kept trying to destroy the kobold statue because it's marked as hostile. Even after I put them in follow mode and moved to the other side of the map, they would immediately start running off to attack that statue the moment I put them back in attack mode unless there were enemies nearby. But as soon as we finished off the enemies, they'd run after that statue again.
Eladrin must really hate kobolds.