Steps to Reproduce

https://zkfiddle.org/sample/2507bb7/3-Exception-during-clientInfo

run fiddle

Current Result

processing mask prevents UI usage,

zAu.disabledRequest  prevents events to fire

Expected Result

Client should resume normal operations after closing alert

Debug Information

onCreate will cause a zAu.cmd0.alert showing the exception

This alert set zAu.disabledRequest to true, which prevents request from being set, but doesn't prevent onClientInfo from triggering startProcessing

This cause the UI to not fire more events, and wait in an unusable state

Workaround

prevent zAu.cm0.alert from disabling the requests

    <script><![CDATA[
        zk.afterLoad("zk", function () {
         var _xzAu = {};
         zk.override(zAu.cmd0, _xzAu, {
                alert: function (msg, title, icon, disabledAuRequest) {
                    if (disabledAuRequest){
                        //zAu.disabledRequest = true;
                        console.log("skipped disableRequest");
                    }
                    jq.alert(msg, {icon: icon || 'ERROR', title: title});
                }
         });
        });
    ]]></script>