This hapened in M2TW: I was defender in siege and spain was attacker. I runned with two hashasims right out of the front gate and whent to two little bushes where I got the hiding mark. The AI played normal and send the siege ram and ladders forward full speed. I took them both out with hashasims and then the spanish charged my hashasims to oblivion.

But AI didnt react to them when they where hidden.