jQuery tools tooltip doesn't appear in first try after hide()

I've used tooltip for a <div>.
It will hide() after couple of seconds.
If I'll mouse over it's trigger after it.
For the first time it will not appear.
Only after I move the mouse over it the second time it will appear.
I used onShow event for binding and used window.setTimeOut.

Is it a problem in the tooltip or in jQuery?

Something like this:

$(document).ready(function() {
    x = $("button").tooltip({
        api: true,
        position: "center right",
        onShow: function() {
            var hid = function() {
                x.getTip().hide();
            };
            window.setTimeout(hid, 2000);
        }});
    x.show();
    });

demo

well, I've fixed it: answer here:

$(document).ready(function() {
    x = $("button").tooltip({
        api: true,
        **effect:"fade"**,
        position: "center right",
        onShow: function() {
            var hid = function() {
                **x.hide();**
            };
            window.setTimeout(hid, 2000);
        }});
    x.show();
    });

http://jsfiddle.net/vKa5Z/5/