I´ve just bought 66i, but when I turn on Expedition mode (manually) my device terminates tracking the route (activitiy) in this mode. When I turn on it says "resuming", but than behaves like it´s starting again with all Garmin logo resulting in 30 seconds countdown asking to enter the expedition mode or resume. I believe it´s something with the specific setting I can´t resolve by myslef. Any help?