sporadic, strange starting behavior 6-speed Geartronic

Hello, There are some topics about the 6-speed Geartronic and its behavior. But I don’t know if my question fits in, so I try it with my own thread. To my “problem”, which is a bit difficult to describe and I could already observe about 5x with my XC60 (MJ2016): After inserting the switch position “D”, the car does not roll off by itself when I go off the brake. I give off a little gas then, but it feels briefly as if “N” Then the car “hops” slightly rough forwards and somehow I have the feeling that it then starts with the four wheel switched on. It’s very difficult to describe as said, because it has happened very rarely so far and you can’t reproduce it. And when it happens, it goes so fast that you don’t even know what it was. It just feels different. Almost as if there was no gear inside at first and then the Haldex is switched on. And if it’s easy to climb up. Any ideas?