Edit: I think found what causes the issue, if you change the colour of the truck to another different than the stock one the issue happen, but if you return the truck to his original colour the issue don't happen.
Hello, I just realized that when you selected a windshield sticker on the store when you exits from garage the sticker not longer matched the selected but if you enter in the garage the sticker will be the selected.
Basicaly the sticker only match the selected inside the garage.
Greetings and keep it improving the game.