TrackPointCreator needs to reset GPSHandler as it might have been running beforehand.

src/main/java/de/dennisguse/opentracks/services/TrackRecordingService.java

@@ -239,7 +239,7 @@ public class TrackRecordingService extends Service implements TrackPointCreator.
      * @param trackId the id of the track to be resumed.
      */
     public void resumeTrack(Track.Id trackId) {
-        trackPointCreator.resetSensorData();
+        trackPointCreator.reset();
         trackRecordingManager.resume(trackId, trackPointCreator.createSegmentStartManual());
 
         // Set recording status

src/main/java/de/dennisguse/opentracks/services/handlers/GPSHandler.java

@@ -162,14 +162,12 @@ public class GPSHandler implements LocationListener, GpsStatus.GpsStatusListener
         return thresholdHorizontalAccuracy;
     }
 
-    /**
-     * Called from {@link GpsStatus} to inform that GPS status has changed from prevStatus to currentStatus.
-     *
-     * @param prevStatus    previous {@link GpsStatusValue}.
-     * @param currentStatus current {@link GpsStatusValue}.
-     */
     @Override
     public void onGpsStatusChanged(GpsStatusValue prevStatus, GpsStatusValue currentStatus) {
         trackPointCreator.sendGpsStatus(currentStatus);
     }
+
+    void reset() {
+        lastTrackPoint = null;
+    }
 }

src/main/java/de/dennisguse/opentracks/services/handlers/TrackPointCreator.java

@@ -70,13 +70,14 @@ public class TrackPointCreator implements BluetoothRemoteSensorManager.SensorDat
         gpsHandler.onStop();
     }
 
-    public void resetSensorData() {
+    public void reset() {
         if (remoteSensorManager == null || altitudeSumManager == null) {
             Log.d(TAG, "No recording running and no reset necessary.");
             return;
         }
         remoteSensorManager.reset();
         altitudeSumManager.reset();
+        gpsHandler.reset();
     }
 
     private SensorDataSet fill(TrackPoint trackPoint) {
@@ -123,7 +124,7 @@ public class TrackPointCreator implements BluetoothRemoteSensorManager.SensorDat
 
         boolean stored = service.newTrackPoint(trackPoint, gpsHandler.getThresholdHorizontalAccuracy());
         if (stored) {
-            resetSensorData();
+            reset();
         }
     }
 
@@ -134,7 +135,7 @@ public class TrackPointCreator implements BluetoothRemoteSensorManager.SensorDat
     public TrackPoint createSegmentEnd() {
         TrackPoint segmentEnd = TrackPoint.createSegmentEndWithTime(createNow());
         fill(segmentEnd);
-        resetSensorData();
+        reset();
         return segmentEnd;
     }