I bought a 2009 Hyundai Sonata with the 4 cylinder engine in late May. It now has 6500 miles.
For the last two months I and my wife have notice a gas smell when we start the engine while it’s still warm. The dealership claims they can’t duplicate the problem.
Try a different Dealer, present the problem without the info that you have had another Dealer look at it previously, (can you remove any previous Dealer logo’s or plate frames?) you want a clean unbiased assement.