Rugging at low speed

Moin, I bought a new car after a long time. A Swift sport hybrid. It has installed the 1.4l boosterjet engine which in relation to my previous bmw (2.8l) is almost a toy engine, however, with a lot of temperament. I am very happy with the small bend, however, it jerks when you start in the cold start. As soon as it gets warmer it takes off it is still available. If I let roll in the 1 gear stand gas every normal car should be completely relaxed ro llen, the Swift, however, jerks every 4-5sec and clacks as if you always hit the clutch or a gear. He got a new software because it was the first suspicion. Until now nobody came to a result and I am really disappointed in the respect. Does anyone have similar experience even if the community is relatively small at the Swift sport hybrid or Swift hybrid? The first 1000km was also quiet it came from the one to the other day. Thanks already for the Hil Greetings