Amundsen navigation issue

On a few occasions I've noticed that if the destination is slightly off a road then the unit is unable to find a route. My most recent example was Leeds Castle near Maidstone, the postcode is for the car park and the car park roads are shown. the same issue occurs when you select home address in the car park, as it's off the road it can't calculate a route, fine as soon as you're on a road. Other nav systems work fine in this scenario. A little irritating when you've  used skoda connect to find the location and sent it to the car only to find it doesn't work. As a work around I move the end marker on the map in skoda connect back to the nearest proper road. Skoda connect returns ME17 1RG for Leeds Castle car park.