Спасибо.
Cделал так
<style>[ng-cloak] { display: none; }</style>
и
<ul class="taskList" ng-cloak>
<li class="taskItem taskItem-{{taskItem.display}}" ng-repeat="taskItem in taskItem track by $index" ng-model="taskItem">
<input type="checkbox" class="taskCheckbox taskCheckbox-{{taskItem.display}}" ng-model="taskItem.complete" ng-change="save()">
<span class="complete-{{taskItem.complete}}">{{taskItem.description}}</span>
<span class="category-{{taskItem.category}} category-{{taskItem.display}}">{{taskItem.category}}</span>
<strong class="taskDate complete-{{taskItem.complete}}">
<i class="fa fa-calendar fa-calendar-{{taskItem.display}}"></i>{{taskItem.date | date : 'mediumDate'}}</strong>
</li>
</ul><!-- taskList -->