Minor EA Bug?

[Bartacus]

earlier today on my Electric Affinity defender I had my sentinel out and, when attacked by a zeus titan's gas of some sort he either teleported or ran unreasonably fast very far away. As a result I could not heal myself off of him. Idk if it's a bug or if its just a bad AI rule that makes it run away but I thought I'd throw it in here anyway since if it happens often that will severely hinder EA's ability to solo. thanks.