Hmm. I noticed it starting to happen when the cyborg boars came out to play for the first time. Though, if that were the case, I feel like they'd just destroy Kerfur flatout.
Now that you mention it, this happened around the time when the boars spawned... My best guess is they are somehow a part of it. they DO target Kerfur units when they see them.
They do, but usually that ends up destroying them. At least... I think. Unless for some reasons, boars in particular turns Kerfur off instead of destroying him.
