Alldata shows campaign 37G1 which might apply to your car. It is a trans control unit software update concerning a hesitation as you specified. You'll need to call your dealer with your VIN number to see if your car falls into the vin range where this bulletin applies. Good luck, hope that helps.

 

It always works that way, especially when you take your car to the dealer for service - the problem miraculously disappears until you get back home!

If you don't think it's throttle by wire or turbo lag issue and without knowing exactly the hesitation - some things that could cause a similar feeling is a faulty O2 sensor or bad coil pack, ignition wires, spark plugs.