Mine did it last winter quite a bit but has been fine up until the recent cold weather and has done it a few times in the last couple of weeks , everything resets to zero on the trip comp . I'm guessing the battery is losing just enough charge to cause a problem . Batteries don't like cold weather , they discharge more easily .My battery will be 3 years old in Febuary so you'd expect it to last longer than this .Maybe insulating the battery might help ??
Just to add . Do all your dash lights light up for a split second before the trip comp resets ?