I think that was just a bug on the Air, and is fixed now.
Kraken says: Deal damage. Create gems. then there is a chance to devour the last troop.
In the air version it was still targeting the dead last troop for the devour instead of targeting the new last troop.
I don't think the Unity Kraken is the bug, I think the old Air Kraken was the bug.
Khorvash reads differently though and i think that this unity Khorvash is bugged.
Khorvash reads: Deal damage to the first 2 enemies. stun them and drain their mana.
He shouldn't be stunning and draining anything other than the first 2 troops.