0.9.6c - Excavation site can be built over

Should an excavation site exclude roads, houses, and buildings until it has been cleared? I would have said yes - and expected it to act like a rock pile or such. Game ignores it and you can build over it as though it isn’t there.

Road and building overlapping site:


Able to place trading post over site:

Villagers walk on the road right through the “walls” of the excavation site: