I had Ski Tracks shut off only once or twice on me. Probably unrelated, but now I always switch to view another app like Safari and/or lock my phone before I put it back in my pocket. Also keep it warm and fully charged. Hasn't happened since.
Now check out these oddities. This is Waidlich even though it says Eaglebrook. That's not the weird part. Check out how my altitude climbs throughout the 2 hours!
While XCing I paused my track because I drove over to another location and I wanted a combined total. It drew a straight line between the two locations. It didn't change the max speed, etc. I'm not sure but I suspect it added to the total distance. I'll have to run a test. One day I hit 4 locations. The map looks like tic tac toe.