I have also experienced this many times at auto crosses. The way it happened to me was that I went to the start line, I pressed the "Define Start", walked the course which probably took about ten minutes, then at the finish line I unlocked my phone (my phone automatically goes to sleep aft...

I did a search for my specific issue and didn't find anything. Here's what's been happening the last few times I've autocrossed: *I am using my phone (iPhone 6) along with a Dual XGPS sampling at 10Hz. *I am running a Chump/Lemons car that has all the non essential wiring stripped out of the car, in...