I can confirm that this same thing happens with my RX5700 XT, and although not nearly as bad, I notice that just having the regular MSAA setting turned on it makes the vehicle reflections slightly less. Not to mention my RX5700 XT can't even hold a steady 60fps @1080p, and it's very disappointing after simultaneously going from gen 1 to gen 3 Ryzen, and GCN to RDNA GPU, and still not being able to have a smooth 60fps result.