Mine refuses to connect to the road

Although all those 4 mines are on the same level, a bit lower than the road, the two rightmost ones refuse to connect to the road.

When I’m holding the mine with the mouse it seems like everything is fine

But when I’m releasing the mouse button this happens:

Game version is 9.1.204
I forgot to mention that :wink:

The problem seems related to terrain height. You can see the terrain is adjusted after you place the building. It doesn’t look like it should give any issues though.
It’s not a real fix, but if you raise the road slightly it sometimes connects where it didn’t connect before.