There is nothing we did that would create a hole in the road that would put a bridge over it so this is an original design issue not something that happened as the result of code changes and if you find it in another of CB's scenarios its the designer not the game
This is a SS from winSPWW2v1.......same issue and that was released before we started expanding the map-making ability
If you are REALLY that bothered by it then use the editor and change it because personally I think this was done deliberately