I have noticed several times that when I'm following a route ( downloaded from Strava ) that when I start a climb wihich is both on the ClimbPro list and a starred Strava Segment, the Garmin initially loses the route then stops following it completely ( as if I had said Stop Following Route. ).
I don't think this happens all the time ( I haven't been able to test it exhaustively )
I don't use the Garmin supplied Maps ( because of the roundabout problem ) and use TalkyToasters OSM maps.
Has anybody else seen this ?