Flickity carousel: Items pushed out of viewport with ng-repeat? - angularjs

Question

Im trying to use metafizzy's flickity framework to display content dynamically, using angulars ng-repeat.
But for some reason the items seem to get pushed out from the flickity-viewport when loaded onto the DOM. Anyone know why that happens and how to avoid it?
The gallery works fine When displaying static content inside it like this;
HTML : STATIC MARKUP EXAMPLE
<div ng-controller="FlickityCtrl">
<div id="main-content" class="gallery js-gallery">
<div class="gallery-cell"> Static Title </div>
<div class="gallery-cell"> Static Title </div>
<div class="gallery-cell"> Static Title </div>
</div>
..its When trying to populate the gallery with the help of angular's ng-repeat directive,that the gallery breaks.
HTML : MARKUP USING NG-REPEAT
<div ng-controller="FlickityCtrl" >
<div id="main-content" class="gallery js-gallery">
<div ng-repeat="chapter in chapters" ng-click="loadSubchapters(chapter.title)">
<h1 class="gallery-cell cell-card-bg">
{{ chapter.title | strip_namespace }}
</h1>
</div>
</div>
<hr>
<button ng-click="loadChapters()" >Load chapters</button>
<hr>
<ul>
<li ng-repeat="chapter in subchapters">
{{ chapter.title | strip_namespace }}
</li>
</ul><br />
<hr >
</div>
JAVASCRIPT
angular.module('FlickityApp', [])
.controller('flickityCtrl', ['$scope', '$timeout', function ($scope, $timeout) {
var updateUI = function(data) {
if (!data || !data.query) { return; }
$timeout(function() {
$scope.chapters = data.query.pages;
console.log(data);
});
};
$scope.loadChapters = function() {
mw.loader.using('mediawiki.api', function() {
(new mw.Api()).get({
action: 'query',
generator: 'categorymembers',
gcmtitle: 'Category:examplepage'
}).done(function(data) {
$timeout(function() {
$scope.chapters = data && data.query ? data.query.pages : {};
});
});
});
};
$scope.loadSubchapters = function(chapterTitle) {
mw.loader.using('mediawiki.api', function() {
(new mw.Api()).get({
action: 'query',
generator: 'categorymembers',
gcmtitle: chapterTitle
}).done(function(data) {
$timeout(function() {
$scope.subchapters = data && data.query ? data.query.pages : {};
});
});
});
};
}])
.filter('strip_namespace', ['$sce', function($sce){
return function(text) {
text = text.split(":");
return text.length > 1 ? text[1] : text[0];
};
}]);
.directive('flickity', [function() {
return {
restrict: 'E',
templateUrl: 'templates/view.html',
replace: true,
scope: { chapters: '=' },
link: function(scope, elem, attrs, ctrl) {
scope.$watch('chapters', function() {
elem.flickity({
// settings
});
});
}
};
}]);
angular.element(document).ready(function() {
angular.bootstrap(document, ['FlickityApp']);
var flkty = new Flickity('.gallery');
});
Link to flickity api : http://flickity.metafizzy.co/api.htm