Hi in the attached save game there is a pioneer unit that has moves left. When you try north of the citiy Cilecrir on a road tile, for example to the shard the path finding does not us the road but instead takes a longer route east off the road. The fastest way would be to go to the hill north of the Kraxis iron mine and take the road from there.
https://www.dropbox.com/s/l3s2hds4t07ejdn/wrong%20pathfinding.zip