No dropdown is rendered.
A dropdown is rendered (see the same demo in Kendo UI for jQuery, or UI for ASP.NET Core)
Workaround - call the Grid's setOptions method on document.ready as shown below:
<script>
$(document).ready(function() {
//replace 'grid' with the actual Name value of your Grid:
$("#grid").data("kendoGrid").setOptions({
toolbar: ["paste"]
})
})
</script>