You would probably be better off asking the vendor of the journey planner, although all their images on their website use Google Maps.  Chobham doesn't have any roundabouts, only miniroundabouts, which may be confusing Beeline.
 https://support.beeline.co/en/support/solutions/articles/77000226043-route-planning-and-mapping

https://beeline.co/blogs/cycling/beeline-routing-and-road-rating