I found 2 things, a bug and a defect of a car:
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The bugatti Divo has the 2 right wheels with a black circle on top, on the left side they are fine, but on the right side it has that ugly circle
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If you have the rocket launcher you can shoot through any wall if you have the sight of the car, that makes one can annoy others by destroying the cars without knowing where you are.
I add a video of the bug and a photo of the bug