Xamarin Forms Geolocator - Issue with PositionChanged

I'm new to Xamarin and GPS solution. I would like to build an app to track the travelling mileage.
I have tried to use the Geolocator plugin from here -> https://components.xamarin.com/view/geolocatorplugin

So far, I'm able to get the current GPS location as well as trigger the PositionChanged event for new GPS location.

The issue I'm facing currently is that if I put the phone on a static location (e.g on the table) without moving it, but then I noticed the PositionChanged event will keep firing periodically and give a new GPS location, isn't the GPS location of the phone should be always the same if it is in static position without moving around?

Is there anything that I have missed out? Below is partial of my code implementation.
Please kindly advise.
Much Appreciated and Thanks.

        var locator = CrossGeolocator.Current;
        locator.DesiredAccuracy = 50;
        locator.PositionChanged += (s, e) =>
        {

                 try
                 {
                     var newPosition = e.Position;
                     Position newLogPosition = new Position(newPosition.Latitude, newPosition.Longitude);    
                     labelNewGPS.Text = "New GPS Location : Latitude :" + newLogPosition.Latitude + ", Longitude: " + newLogPosition.Longitude; ;
                 }
                     catch (Exception ex)
                 {
                     labelErrorMessage.Text = "Trip Log encountered error - " + ex.Message.ToString();
                 }
        };
        locator.PositionError += (s, e) =>
        {
              labelErrorMessage.Text = "Trip Log encountered error - " + e.Error.ToString();
        };

        ......
        ......

       if (!locator.IsListening)
       {
              await locator.StartListeningAsync(1000, 0);
       }