Another long shot but is it on Auto Detect? Because it might have missed the first bit if youre a fast runner! Plus is the Google precise location setting on? I gather the latter can be a battery-drainer but it might be worth switching it on for specific things like this.
Hi, no it's not on auto detect. It actually gave me the time for my first mile so it was recording it somewhere. I'll give the Google precise location option a go thanks