I’ve noticed an issue this weekend where, on cars that you already own that feature factory stripe/decal packages (such as the '79 Camaro Z28, the FPV Ford Falcon), where if you go into the booth to paint them a new manufacturer color, they retain the stripe/decal color from the one you’re changing from.
For example, I have a brown '79 Camaro Z28, and if I try to paint it one of the other colors, it carries over the brown-and-tan stripe package, even though that is supposed to change. It appears to be affecting all cars with stripe packages, because I went to switch an FPV ford with a black stripe to a manufacturer combo with orange as the accent and it still carries over the black stripe from the original color instead.
This is only affecting owned cars in player garages. If you go to buy, say, a NEW '79 Z28, and you cycle through the manufacturer colors, the correct contrast stripe packages display.