How to cancel the displacement of the balloon in Yandex maps?

Question

Yandex maps

When narrowing the screen to 320px, the balloon moves under the map.



ymaps.ready(init);

function init(){
var myMap = new ymaps.Map("map", {
center: [55.756514141750216,37.60775160863393],
zoom: 14,
controls: [],
})

var myPlacemark = new ymaps.Placemark(
[55.755,37.609] ,
{ balloonContent: 'Label' },
{
hideIconOnBalloonOpen: false,
balloonOffset: [5, -40],
preset: 'islands#icon',
iconColor: '#ea3c3b'
},
{
balloonPanelMaxMapArea: 0
}
);
myMap.geoObjects.add(myPlacemark);
myPlacemark.balloon.open();
}

How to ensure that it remains on the map?