I must say here that, I think you will find the fuel cutoff issue is not isolated or related to the DSG system.
I drive a Manual Mk5 GTi and the exact same thing happens. Usually as you leftfoot trailbrake into a corner with a small amount of power still applied, the engine completely cuts out for around 2 seconds and gradually rebuilds grunt again. This issue really impears my driving style through a series of twisting curves and does verge on dangerous.
The vehicle is a South African build and I am in Australia. WOULD BE INTERESTED TO KNOW WHETHER THE SYSTEM CAN BE MODIFIED .