Sometimes when I am driviing (i.2 pop dualogic) I can have my foot off the accelerator and the car is in 1st or 2nd and it will move forwards on its own. Noticed this in stop start traffic. It was even moving forwards on a hill with my foot off the gas. But other times if I take my foot off the gas it is staionery and will roll back on a hill. There seems no pattern to this. Is it a faullt maybe? or just a quirk. I cant find any pattern to it. I can be in a queue of traffic and have my foot off the gas and it will move forwrd on its own, but at other times, same scenario, it wont.