Sticky sidebar "jump" problem

gistfile1.txt

// Sticky article aside
$(window).on('load', function(){
    $('#sidebar').stick_in_parent({
        offset_top: 72,
        parent: '#main',
        spacer: false
    });
});
$('#sidebar').on('sticky_kit:bottom', function(e) {
  $(this).parent().css('position', 'static');
}).on('sticky_kit:unbottom', function(e) {
  $(this).parent().css('position', 'relative');
});