When a kendoContextMenu is applied to a combobox (html tag select) you are not able to show the select options by tapping it. The behaviour is on mobile browser only (tested iPad and Google Chrome developer tools with device toolbar enabled).
I reproduced the issue in telerik dojo, here is the code.
<!DOCTYPE html>
<html>
<head>
<base href="https://demos.telerik.com/kendo-ui/menu/context-menu">
<style>html { font-size: 14px; font-family: Arial, Helvetica, sans-serif; }</style>
<title></title>
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2021.1.330/styles/kendo.common-bootstrap.min.css" />
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2021.1.330/styles/kendo.bootstrap.min.css" />
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2021.1.330/styles/kendo.bootstrap.mobile.min.css" />
<script src="https://kendo.cdn.telerik.com/2021.1.330/js/jquery.min.js"></script>
<script src="https://kendo.cdn.telerik.com/2021.1.330/js/kendo.all.min.js"></script>
</head>
<body>
<div id="example">
<select>
<option>Opzione 1</option>
<option>Opzione 2</option>
<option>Opzione 3</option>
</select>
<ul id="menu">
<li>
<img src="../content/web/toolbar/reply.png" /> Reply
</li>
</ul>
</div>
<script>
$(document).ready(function() {
setTimeout(function () {
var initMenu = function () {
menu = $("#menu").kendoContextMenu({
target: "select",
select: function(e) {
// Do something on select
}
});
};
initMenu();
}, 0);
});
</script>
</body>
</html>