We had the new 1.26 update which modified Terrain Builder, and then it was "reverted" but I don't think it has been entirely reverted.
When I place a new road in Terrain Builder, or add to an existing road, or delete some road, this change is not reflected in Buldozer. The only way to make Buldozer reflect the change is by disconnecting from Buldozer and then starting it up again.

Note: This is NOT a case of a road intersecting a new terrain cell, in which you can just tickle the terrain and it re-renders and fixes it for you - this trick does not work to resolve this issue.