diff -u b/core/includes/config.inc b/core/includes/config.inc
--- b/core/includes/config.inc
+++ b/core/includes/config.inc
@@ -179,6 +179,7 @@
  *   The storage to synchronize configuration to.
  */
 function config_sync_changes(array $config_changes, StorageInterface $source_storage, StorageInterface $target_storage) {
+  $factory = drupal_container()->get('config.factory');
   foreach (array('delete', 'create', 'change') as $op) {
     foreach ($config_changes[$op] as $name) {
       if ($op == 'delete') {
@@ -188,10 +189,9 @@
         $data = $source_storage->read($name);
         $target_storage->write($name, $data);
       }
+      $factory->resetConfig($name);
     }
   }
-  // Config might have changed, reset the stored config objects.
-  drupal_container()->get('config.factory')->resetConfigs();
 }
 
 /**
diff -u b/core/lib/Drupal/Core/Config/ConfigFactory.php b/core/lib/Drupal/Core/Config/ConfigFactory.php
--- b/core/lib/Drupal/Core/Config/ConfigFactory.php
+++ b/core/lib/Drupal/Core/Config/ConfigFactory.php
@@ -76,5 +76,13 @@
 
   function resetConfigs() {
-    $this->configs = array();
+    foreach ($this->configs as $config) {
+      $config->init();
+    }
+  }
+
+  function resetConfig($name) {
+    if (isset($this->configs[$name])) {
+      $this->configs[$name]->init();
+    }
   }
 }
diff -u b/core/lib/Drupal/Core/DrupalKernel.php b/core/lib/Drupal/Core/DrupalKernel.php
--- b/core/lib/Drupal/Core/DrupalKernel.php
+++ b/core/lib/Drupal/Core/DrupalKernel.php
@@ -160,6 +160,7 @@
     $bundles = array(
       new CoreBundle(),
     );
+    $this->bundleClasses = array('Drupal\Core\CoreBundle');
 
     // Ensure we know what modules are enabled and that their namespaces are
     // registered.