While you are in the car? Or, when you get in it after leaving it for a while?
My Sportback did it once, and it was when I left the interior light on for a few hours. It basically seemed to reset the clock to 00:00... so if yours is doing this (overnight or during the day when left for a long time) then you would possibly see random times.
If it does it when you are driving then that's a different matter....