Problem was because IE has option icon "X" to empty input field.
Due to that legacy code bug appears.
In order to fix bug you have 2 options :
- Add additional code inside plug-in file :"searchNavMenu.js"

//----- Clear field IE problem, it's not on KEYUP
$("input.srch_input").bind('input propertychange', function(e, pageEvent) {
if (this.value == "") {
var currItem = document.activeElement;
setCurrentNav(item_id);
if (!pageEvent)
saveSesSateNav("");
if (SNMOptions.UseFocus)
currItem.focus();
else
$(this).focus();
}
});
- Or option if you will not use anymore IE 11 even better in that case remove that part of code :

In next release issue will be fixed with first option. (release > 2.1)
Problem was because IE has option icon "X" to empty input field.
Due to that legacy code bug appears.
In order to fix bug you have 2 options :
//----- Clear field IE problem, it's not on KEYUP $("input.srch_input").bind('input propertychange', function(e, pageEvent) { if (this.value == "") { var currItem = document.activeElement; setCurrentNav(item_id); if (!pageEvent) saveSesSateNav(""); if (SNMOptions.UseFocus) currItem.focus(); else $(this).focus(); } });In next release issue will be fixed with first option. (release > 2.1)