We have a month old 2017 XC60. I have had a problem both times I filled up the car with gas. The first time, the pump kicked off about about 7/8 full. Second time, I did it manually and pumped in the gas slowly but it still seems to cut off without being full. The car in both cases were at a slight (very slight) angle. Does it have to perfectly level to be allow a complete fillup?