Three times total over a period of two days. The third time, early this am, took a long time to restart and I had to keep pushing the on/off button to finally get it moving. All 3 times Waze was on but I was on a cross country drive so Waze was on each day of my drive. I keep it updated as soon as I see one is out and I never scheduled it to download except in the middle of the night. Thoughts?