AngularJS $scope doesn't render after being updated

You are probably changing the $scope outside of the angular $digest(). Try replacing code making changes with $scope.$apply(function(){ code making changes }). With this the dirty-check should run and update all.

I would recommend using:

$scope.$evalAsync(function() { // scope changes here });

This way you won't run into problems like trying to call apply when there's a digest already in progress.