AI enemy wont climb the ladder during siege defense. How am I supposed to win?

[DuckSoup]

So no matter what I do, I cannot get the enemy to climb the ladder. My guys are waiting on the other side. I've tried reducing battle size (What the image shows) but nothing I do gets them to move. They just bunch up at the bottom. It makes owning my own kingdom worthless because every siege battle ends the same. (It doesn't)

Here's an example image. (This forum wont let me insert the link, so just put in the HTTP where it belongs) <Insert http>://imgur.com/1P9CyrO

 

[SirGrouch]

Use archers?

 

[Mars_Mullo]

You could open the scene in edit mode and check that there isnt any glitched scene items or fences sitting invisibly on the ladder or move it slightly down a bit perhaps ?

 

[Quixote]

This seems strange. Do you order to "charge" during siege? Occasionally (not often) this can cause issues. Especially with archer forces.

This could also be a result of a more ladders mod, or castle mod. Some of these mods can mess with pathing. Have you attempted this with these uninstalled?
If no, try installing one.
https://forums.taleworlds.com/index.php?topic=210501.0

You shouldn't have to use the editor to fix this. This seems like an AI or mod problem.
How do they react when YOU are the attacker in a siege?