Was doing some testing with AI and just for fun i tried ordering them to build a wall with taunt 54->build a wall between the flared locations, and it builds the wall instantly, without a villager having to walk there or any construction, it just instantly appears. Only the gates remain unconstructed.

Don't really play against the AI myself so I don't personally care about this and it's kinda funny actually but probably not the expected behaviour.

(1.6 default AI - Promi 2.1)

Interesting, thanks for the tip.