diff --git a/core/modules/block/custom_block/lib/Drupal/custom_block/Entity/CustomBlockType.php b/core/modules/block/custom_block/lib/Drupal/custom_block/Entity/CustomBlockType.php
index 59a4735..6431ba3 100644
--- a/core/modules/block/custom_block/lib/Drupal/custom_block/Entity/CustomBlockType.php
+++ b/core/modules/block/custom_block/lib/Drupal/custom_block/Entity/CustomBlockType.php
@@ -75,7 +75,7 @@ class CustomBlockType extends ConfigEntityBase implements CustomBlockTypeInterfa
   public function postSave(EntityStorageControllerInterface $storage_controller, $update = TRUE) {
     parent::postSave($storage_controller, $update);
 
-    if (!$update) {
+    if (!$update && !$this->isSyncing()) {
       entity_invoke_bundle_hook('create', 'custom_block', $this->id());
       if (!$this->isSyncing()) {
         custom_block_add_body_field($this->id);
diff --git a/core/modules/entity_reference/entity_reference.module b/core/modules/entity_reference/entity_reference.module
index 4f15acd..b9aa260 100644
--- a/core/modules/entity_reference/entity_reference.module
+++ b/core/modules/entity_reference/entity_reference.module
@@ -74,6 +74,11 @@ function entity_reference_field_config_update(FieldConfigInterface $field) {
     return;
   }
 
+  if ($field->isSyncing()) {
+    // Don't change anything during a configuration sync.
+    return;
+  }
+
   if ($field->getSetting('target_type') == $field->original->getSetting('target_type')) {
     // Target type didn't change.
     return;
diff --git a/core/modules/filter/lib/Drupal/filter/Entity/FilterFormat.php b/core/modules/filter/lib/Drupal/filter/Entity/FilterFormat.php
index 4e6febf..65e254f 100644
--- a/core/modules/filter/lib/Drupal/filter/Entity/FilterFormat.php
+++ b/core/modules/filter/lib/Drupal/filter/Entity/FilterFormat.php
@@ -238,7 +238,7 @@ public function postSave(EntityStorageControllerInterface $storage_controller, $
       // Clear the filter cache whenever a text format is updated.
       Cache::deleteTags(array('filter_format' => $this->id()));
     }
-    else {
+    elseif (!$this->isSyncing()) {
       // Default configuration of modules and installation profiles is allowed
       // to specify a list of user roles to grant access to for the new format;
       // apply the defined user role permissions when a new format is inserted
diff --git a/core/modules/image/image.module b/core/modules/image/image.module
index c1420c1..ec64df3 100644
--- a/core/modules/image/image.module
+++ b/core/modules/image/image.module
@@ -387,6 +387,11 @@ function image_filter_keyword($value, $current_pixels, $new_pixels) {
  */
 function image_entity_presave(EntityInterface $entity) {
   $field = FALSE;
+
+  if ($entity->isSyncing()) {
+    return;
+  }
+
   $entity_type_id = $entity->getEntityTypeId();
   if ($entity_type_id == 'field_instance_config') {
     $field = $entity->getField();
diff --git a/core/modules/image/lib/Drupal/image/Entity/ImageStyle.php b/core/modules/image/lib/Drupal/image/Entity/ImageStyle.php
index 1b3c8db..6f26574 100644
--- a/core/modules/image/lib/Drupal/image/Entity/ImageStyle.php
+++ b/core/modules/image/lib/Drupal/image/Entity/ImageStyle.php
@@ -105,7 +105,9 @@ public function postSave(EntityStorageControllerInterface $storage_controller, $
         // The old image style name needs flushing after a rename.
         $this->original->flush();
         // Update field instance settings if necessary.
-        static::replaceImageStyle($this);
+        if (!$this->isSyncing()) {
+          static::replaceImageStyle($this);
+        }
       }
       else {
         // Flush image style when updating without changing the name.
@@ -126,7 +128,7 @@ public static function postDelete(EntityStorageControllerInterface $storage_cont
       // Check whether field instance settings need to be updated.
       // In case no replacement style was specified, all image fields that are
       // using the deleted style are left in a broken state.
-      if ($new_id = $style->getReplacementID()) {
+      if (!$style->isSyncing() && $new_id = $style->getReplacementID()) {
         // The deleted ID is still set as originalID.
         $style->setName($new_id);
         static::replaceImageStyle($style);
diff --git a/core/modules/language/language.module b/core/modules/language/language.module
index f196969..8bbcfc1 100644
--- a/core/modules/language/language.module
+++ b/core/modules/language/language.module
@@ -640,7 +640,7 @@ function language_modules_uninstalled($modules) {
  * Implements hook_language_insert().
  */
 function language_language_insert($language) {
-  if (!empty($language->locked)) {
+  if (!empty($language->locked) || $language->isSyncing()) {
     return;
   }
 
diff --git a/core/modules/menu/menu.module b/core/modules/menu/menu.module
index 660e1df..bdf5059 100644
--- a/core/modules/menu/menu.module
+++ b/core/modules/menu/menu.module
@@ -144,6 +144,11 @@ function menu_menu_insert(Menu $menu) {
   if (\Drupal::moduleHandler()->moduleExists('block')) {
     \Drupal::service('plugin.manager.block')->clearCachedDefinitions();
   }
+
+  if ($menu->isSyncing()) {
+    return;
+  }
+
   // Make sure the menu is present in the active menus variable so that its
   // items may appear in the menu active trail.
   // See menu_set_active_menu_names().
@@ -330,6 +335,9 @@ function menu_node_update(EntityInterface $node) {
  * Implements hook_node_type_insert().
  */
 function menu_node_type_insert(NodeTypeInterface $type) {
+  if ($type->isSyncing()) {
+    return;
+  }
   \Drupal::config('menu.entity.node.' . $type->id())
     ->set('available_menus', array('main'))
     ->set('parent', 'main:0')
@@ -340,6 +348,9 @@ function menu_node_type_insert(NodeTypeInterface $type) {
  * Implements hook_node_type_delete().
  */
 function menu_node_type_delete(NodeTypeInterface $type) {
+  if ($type->isSyncing()) {
+    return;
+  }
   \Drupal::config('menu.entity.node.' . $type->id())->delete();
 }
 
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Vocabulary.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Vocabulary.php
index ee3d8f3..5b8a34e 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Vocabulary.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Vocabulary.php
@@ -102,7 +102,7 @@ public function postSave(EntityStorageControllerInterface $storage_controller, $
     if (!$update) {
       entity_invoke_bundle_hook('create', 'taxonomy_term', $this->id());
     }
-    elseif ($this->getOriginalId() != $this->id()) {
+    elseif ($this->getOriginalId() != $this->id() && !$this->isSyncing()) {
       // Reflect machine name changes in the definitions of existing 'taxonomy'
       // fields.
       $field_ids = array();
@@ -153,6 +153,13 @@ public static function preDelete(EntityStorageControllerInterface $storage_contr
   public static function postDelete(EntityStorageControllerInterface $storage_controller, array $entities) {
     parent::postDelete($storage_controller, $entities);
 
+    // Reset caches.
+    $storage_controller->resetCache(array_keys($entities));
+
+    if (reset($entities)->isSyncing()) {
+      return;
+    }
+
     $vocabularies = array();
     foreach ($entities as $vocabulary) {
       $vocabularies[$vocabulary->id()] = $vocabulary->id();
@@ -180,8 +187,6 @@ public static function postDelete(EntityStorageControllerInterface $storage_cont
         }
       }
     }
-    // Reset caches.
-    $storage_controller->resetCache(array_keys($vocabularies));
   }
 
 }