Norsca's hunts can... run away? (Bug)

So I just tried to do a

starting the 2nd hunt, ready to grab myself a Preyton!

Preyton was not having it.

So when doing hunts everything seems about right until you do their 2nd hunt. If your army is too powerful the quest battle will just... flee, like a regular army then disappear. And if you then try to run back to the marker to fight again, the same thing repeats. Making it impossible for me to finish the quest unless I sacrifice several units