The siege tower bug - how big a problem is it?

[Atilius]

Also, I think it's only large siege towers attacking large stone walls that have the problem. Conceivably modding out them will remove the problem for both you and the AI.

This is what I see too. It happened when I couldn't build ladders, but not when I could.

[Barbarossa82]

That's interesting. I actually tried the same siege assault again in order to try the backspace trick, and this time my men actually managed to get up there of their own accord.