My Freelander 2 2014 tech, loses power after sitting in traffic or if it's left idling for any reason. My mechanic and the local landrover specialist, have no clue as to why this happens. The car won't move untill I start to pump the accelerator and even then it's slow and laboured. Once turned off for a while, it returns to normal! Has anyone had a similar problem, any clues would be welcome. Thanks