( Should have been reported earlier ... but I do not find evidence on the official thread ... very minor bug)

On a normal map, for the two first building of a town, we can see which tiles are constructible and which are not. After the second building, only a few green tiles are still appearing ( no red one) and you can still build on other tiles ( not surrounded by green ... see picture). After leaving the construction mode and coming back to it, no green tiles remained

... the building really alaivable locations seems coherent, just the graphics are wrong!

hope that helps!