Distance to next turn - huge error

When following a route the top of the screen normally shows distance to next turn. However, on multiple occasions on different routes I get the distance it would be should I decide to go the opposite way around the Earth, therefore the distance to go shows as 24,900 miles! All these routes were planned in Strava and synced through automatically. I only have one picture but I will repeat that this has happened numerous times on numerous different courses.