Twice now, this has happened where my car doesn’t interact with other objects. I’ll drive through walls, rocks, guardrails, traffic cars and all kinds of other things that would normally either be a barrier or be something smashable. Restarting usually fixes it but when playing with others, I’m afraid I could get accused of doing something nefarious (like not being affected by traffic cars in street races). So I’m just throwing this out there so people know about it.