I cannot obtain a Northbound route through a certain road junction, although a Southbound route works fine.
It is as though there is a Northbound discontinuity at the junction, as Navigator tries to get me to backtrack and go via another route right up to the junction, but immediately recalculates the route as soon as I get North of it.
Could this be a bug in Navigator's reading of the mapping data, or should I be reporting this to OSM as an error in the mapping data?