Hi Darren,
Thank you for reporting this issue! I updated your Telerik points for it.
Until we fix it, you can use the following _onElementFocus function override as a temporary solution for the issue:
<script>
var flag = false;
(function () {
$(document).on('mousedown', '.RadPanelBar .rpItem', function (e) {
$(this).focus();
flag = true;
})
})();
_onElementFocus = Telerik.Web.UI.RadPanelBar.prototype._onElementFocus;
Telerik.Web.UI.RadPanelBar.prototype._onElementFocus = function (e) {
if (!flag) {
_onElementFocus.call(this, e);
}
}
</script>
Regards,
Rumen
Progress Telerik