Hi greetings, i try to put in my PDF a google maps with a polyline, everything is good but the render of my map not showing completely; something like that

this is my code
/**
 * This is a google example of here: 
 * https://developers.google.com/maps/documentation/javascript/shapes#maps_polyline_simple-javascript
 *
*/
    function initMap() {
        const map = new google.maps.Map(document.getElementById("map"), {
            zoom: 3,
            center: { lat: 0, lng: -180 },
            mapTypeId: "terrain",
        });
        const flightPlanCoordinates = [
            { lat: 37.772, lng: -122.214 },
            { lat: 21.291, lng: -157.821 },
            { lat: -18.142, lng: 178.431 },
            { lat: -27.467, lng: 153.027 },
        ];
        const flightPath = new google.maps.Polyline({
            path: flightPlanCoordinates,
            geodesic: true,
            strokeColor: "#FF0000",
            strokeOpacity: 1.0,
            strokeWeight: 2,
        });
        flightPath.setMap(map);
        // ===> I add that code <===
        google.maps.event.addListenerOnce(map, 'tilesloaded', function(){
            window.JSREPORT_READY_TO_START = true;
        });
    }
                    
thanks for the time and any help is welcome