update to use $timeout w/ invokeApply=false

js/angular/service/backdrop.js

@@ -34,8 +34,8 @@
  */
 IonicModule
 .factory('$ionicBackdrop', [
-  '$document',
-function($document) {
+  '$document', '$timeout',
+function($document, $timeout) {
 
   var el = jqLite('<div class="backdrop">');
   var backdropHolds = 0;
@@ -74,9 +74,9 @@ function($document) {
   function release() {
     if ( (--backdropHolds) === 0 ) {
       el.removeClass('active');
-      setTimeout(function() {
+      $timeout(function() {
         !backdropHolds && el.removeClass('visible');
-      }, 400);
+      }, 400, false);
     }
   }