I haven't seen it in my current campaign before. It just started now and already happened several times. I have many mounted archers. When they attack everything is fine and then after a while they stand in a line on the borders. They are stuck, don't listen to my movement commands and just look in the direction of the border. Then after a while some of them dismount continue being stuck. The morale of my army is good, other troops but mounted archers obey my movement commands. I have new formations and advanced mounted archers AI on. This has happened in the vicinity of Gundabad. Is there a way to fix it without turning the advanced AI off?