Popup newsletter flashing once in homepage

I've got a problem with simple popup newsletter in homepage...Basically after I close the popup, if I refresh homepage, popup appears for about one second then disappear.

This is the code:

  function popup(){    $('.jsclosepoup').on('click', function() {      $('.jsengo_popup').addClass('d-none');    });  }

<section class="popup jsengo_popup"><div class="modal-window"><div class="window-window"><div class="window-content clearfix"><a class="close_edit jsclosepoup" title="Close" href="javascript:void(0)">ù              Something useful for Newsletter...</a></div></div> </div></section>

I would like to prevent newsletter appears for a second if I already close it....