Odd guard behavior

[Lingchih]

So, in playing a test game with Patala, I saw a really odd battle.

My prophet was trying to storm an Agarthan castle. She had a small army... some Gandharva summons, a few elephants, and some apes. Well, Agartha hit me before the storming, so most of the army was lost, though I won the battle.

So now, ensuing, the prophet does indeed storm the castle. Mostly archers defending. Agartha has one skellie spammer in the back. My remaining Gandharvas (5) are set to guard commander. So, I have 6 units, none set to attack, for the storming.

OK, here's the odd thing. After many turns of just shooting at each other, 3 of my Gandharva guards decided to attack into the castle. They weren't berserk or anything. They just disregarded guard commander orders and took off. And, they won me the castle.