Blair. B84

It's now done this a couple times in cooler weather. I finally caved and we took it into a mechanic earlier in the week and they can't find anything wrong with it. If anyone has any ideas let me know. Thanks

Hello all, My fiance drives a 2015 Micra. For the last few months it's stalled on hot days. It can drive for hours on the highway and once we get in town stalls at a stop light or roundabout. It almost feels like it's running out of gas or vapour lock. If we let it sit a while it will start right up. Does anyone know what causes this? I'm assuming it's a sensor but the car isn't giving any codes. Thanks Blair