Switchback - V303

just to add to my previous comment, my elevation is 4,003 ft and the watch shows altitude as 12,418, what measurement is this? I saw it changing as I was laying down in bed. I don't know what the Facer studio uses as it's framework for elevation/altitude. An compass app on my watch (screenshot attached) shows the altitude is 1,252m, which is 4,108 in feet,0 so that appears accurate.