setTimeout not working after first time execution

[Dejanzr]

What am I doing wrong here ?

      var expanded = $('#block-mainnavigation .menu-item--expanded', context);
      var subMenu = $('#block-mainnavigation .menu-item--expanded .menu', context);


       expanded.mouseover(function () {
         $(this).find('.menu', context).show();
       });


     setTimeout(function () {
        expanded.mouseleave(function () {
          subMenu.hide();
        })
        }, 3000);

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