You are likely seeing the foot contact only on the road because it is the lowest part of the set, and right on the grid, which what your character is walking on if you have not specified a different terrain.
If only need characters on the path, and wish to use the grid as the walking surface, you can lower the set so the path is at grid level. It's a cheap workaround if you cannot get both working properly as terrain as Raxel_67 mentioned.
Edited
5 Years Ago by
Rampa