unStick Element failed when position of this element change

by Guillaume Seguin

HTML

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.0/angular.min.js"></script>
<script src="https://cdn.rawgit.com/d-oliveros/ngSticky/v1.7.9/lib/sticky.js"></script>
<script src="https://cdn.rawgit.com/paulirish/matchMedia.js/master/matchMedia.js"></script>
<div ng-controller="stickyCtrl">
    <button ng-click="add()">Hide me and toogle stick / unstick element below</button>
    <div ng-repeat="item in itemList" ng-show="$last">
        <div class="sticky" sticky>It's Sticky! <span ng-bind="item"/></div>
        <div class="deep"></div>
    </div>
</div>

CSS

.sticky{
    background-color:green;
}
.deep{
    background-color:red;
    height: 650px;
}

JavaScript

'use strict';

var app = angular.module('myApp', ['sticky']);

app.controller('stickyCtrl', function($scope) {
    var i = 1;
    $scope.itemList = [];
    $scope.add = function(){
        $scope.itemList.push(i++);
    };
    $scope.add();
});