Resolved problem with ADDON and mobile

Hi, I've been trying JS in and out of main.js, but the problem is the same, don't working in mobile. Please I need resolve this issue.

This is the jQuery code:

//medicals combobox

$('#speciality').on('change', function (event) {
event.preventDefault();
var id = $('#speciality').val();


jQuery.ajax({
type: 'POST',
url: '/components/com_sppagebuilder/addons/appointment_form/medical.php',
data: {'id': id},
beforeSend: function () {
$('#medical').hide();
},
success: function (response) {

$('#medical').html(response);

setTimeout(function(){
$('#medical').show() }, 1000);
}
});
});

the medical.php return the medical list.

Thanks