When the builders are fixing the hospital, they - or at least some of them - start to circle the building and get stuck at the top, going back and forth. Their task bars say that they are fixing the building, but they just continue to go back and forth. Is this a _bug_ or something necessary for that particular building?

Something similar happens to the trainee doctors who circle between the plants to study (they actually do that if they have no other previous skills until they become adepts, after that they become lazy as...). When the doctor comes from the top of the village and wants to study the red rose in the bottom right corner, he often gets stuck between the irrigation and the dam construction, going back and forth until I rescue him.

I know of the other stuck villagers (such as the kids and the doctors by the black vine) but I haven't been able to find anything about this in the forum. Does anyone know something about it?