This is the inherit DCT issue. The free clutch will always have the next gear ready until final drive. If the speed goes down the clutch has to disengage and than engage the lower gear on the shaft.
That's y it gives this jerkiness during city traffic, DCTs can be pretty finiky, vw with all their research messed up a little at start.
just one thing NEVER EVER CHANGE YOUR GEAR OIL TO ANYTHING NOT SPECIFIED BY THE MANUFACTURER. all Pak DCT cars are wet clutch and any funny or non spec oil can literally eat the main clutches. Case in point vw Tiguan.