I tried to create some ambient civilians ( and atmosphere) at the waterside of Kavala and I placed a group of 2 civilians on the pier with a move order to walk to the other end of the pier, I tried a dozen times but they will refuse to choose a path over the pier. They will always go to the backside of the houses and walk from there to the other end. (example added)
Also, When I place myself on the pier I will often spawn under the pier (depending where, close to water) or mingled up in the concrete floor. The pier is not set to altitude zero. I have to set both myself and AI to altitude 2 to spawn properly. {F21774}