Map shows lines joining Send points as well as Track points

My inReach Explorer+ used to show the track as a single line joining the tracking points.    In the last month it has started to also join the send points with a straight line.  I have the tracking interval set at 1 minute and the send interval set at 20 minutes.  So after a road trip I have the track following the map road fairly closely but also straight lines cutting corners! Does anyone know how to switch this "feature" off?