Well, that is 0.8.2b version and Kerfur's pathfinding AI is broken at one place of map. I can say that other people have also same issue here.
https://youtube.com/clip/UgkxwWlcLdIh2xnWi61EbIFJ45Y0UwkcBPm7?si=o1ImRkr3LO9wfuK...
I think that this hapen scepcially in one place at map but mysel,fI don't know specially where