Vehicle wheel -> don't create shape crash

Hi guys, My team is trying to make a ghost car in a racing game (so the player can get through this car without crashing with it in any way). We set the ghost car in a specific layer and then in the collision presets of the player we put it in “ignore”.

All seems to work with the body of the vehicle, but the wheels keep colliding no matter what.

We tried to remove the “Don’t create Shape” from the wheeled vehicle (as shown in the image), but as soon as we hit play the editor crashes. We created the class again, tried it in another project and all that but still.

is this a known issue? are we doing something wrong?
Thanks in advance.