I was going through my cars, making sure they work with latest version and stumbled upon one that was build upon a body that is now bugged (but wasn’t back then). I have verified that the same thing happens when making a new car on this body, so the fault would lie with the body and not an old car.
I am providing screenshots to see which body it is and what the problem is. The issue is the pink/red bit - it cannot be colored, morphed or selected and it is permanently stuck on default color. The pink on chassis build screen suggests as if it didnt have a material assigned or something. Additionally, on the opposite side of the car, the model is missing the step and there is a hole in addition to color issues.