I just bought a brand new 2018 sonata SEL last week and have only put 100 miles on it. The only frusterating thing is when I am driving In standard drive mode I will let off the gas to take a turn or what now and when I go to press the gas pedal again there is this slight hesitation/low knocking sound for a second until I press the gas more then it goes away. It's almost as if it's in too high a gear and is not downshifting accordingly. It does not do this in sport mode. Anyone else experiencing this?