MapBox problem while drawing line between two points with positive / negative longitude in Laravel 5.8

I have an application where I want to draw an arc / line between two locations. Everything works fine but when I want to draw a line between two points ( 1 with positive longitude like China --- 2nd with negative longitude like USA ). It draws an additional line somewhere near or exactly on equator line. see image

Help in this regard is requested please. I have pasted the coordinates as well from code.

    //Coords for some place in China
    $from_lng = 115.5781792430219; //16.763;
    $from_lat = 36.204409420941516; //41.138;
    $results['from_coord'] = array($from_lng, $from_lat);

    //Coords for some place in USA
    $to_lng = -122.42963325696385; //9.515;
    $to_lat = 39.804333950461285; //40.901;
    $results['to_coord'] = array($to_lng, $to_lat);


    //Calculating average to center map
    $results['posn'] = array(
      ($from_lng + $to_lng)/2,
      ($from_lat + $to_lat)/2
    );

via Chebli Mohamed