diff --git a/core/modules/content_moderation/src/Plugin/WorkflowType/ContentModeration.php b/core/modules/content_moderation/src/Plugin/WorkflowType/ContentModeration.php
index c682213..a5d0401 100644
--- a/core/modules/content_moderation/src/Plugin/WorkflowType/ContentModeration.php
+++ b/core/modules/content_moderation/src/Plugin/WorkflowType/ContentModeration.php
@@ -145,7 +145,8 @@ public function removeEntityTypeAndBundle($entity_type_id, $bundle_id) {
   public function addEntityTypeAndBundle($entity_type_id, $bundle_id) {
     if (!$this->appliesToEntityTypeAndBundle($entity_type_id, $bundle_id)) {
       $this->configuration['entity_types'][$entity_type_id][] = $bundle_id;
-      natsort($this->configuration['entity_types'][$entity_type_id]);
+      sort($this->configuration['entity_types'][$entity_type_id]);
+      ksort($this->configuration['entity_types']);
     }
   }
 
diff --git a/core/modules/content_moderation/tests/src/Kernel/ContentModerationWorkflowTypeApiTest.php b/core/modules/content_moderation/tests/src/Kernel/ContentModerationWorkflowTypeApiTest.php
index 5de2ced..bf84628 100644
--- a/core/modules/content_moderation/tests/src/Kernel/ContentModerationWorkflowTypeApiTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/ContentModerationWorkflowTypeApiTest.php
@@ -78,4 +78,26 @@ public function testAppliesToEntityTypeAndBundle() {
     $this->assertFalse($workflow_plugin->appliesToEntityTypeAndBundle('fake_node', 'fake_page'));
   }
 
+  /**
+   * @covers ::addEntityTypeAndBundle
+   * @covers ::removeEntityTypeAndBundle
+   */
+  public function testAddEntityTypeAndBundle() {
+    /** @var \Drupal\content_moderation\Plugin\WorkflowType\ContentModeration $workflow_plugin */
+    $workflow_plugin = $this->workflow->getTypePlugin();
+    // The content moderation plugin does not validate the existence of the
+    // entity type or bundle. The entity types and bundles are intentionally
+    // added in reverse alphabetical order.
+    $workflow_plugin->addEntityTypeAndBundle('fake_node', 'fake_page');
+    $workflow_plugin->addEntityTypeAndBundle('fake_block', 'fake_custom');
+    $workflow_plugin->addEntityTypeAndBundle('fake_node', 'fake_article');
+    // The entity type keys and bundle values should be sorted
+    // sorted alphabetically. The bundle array index should not reflect the
+    // order in which they are added.
+    $this->assertSame(
+      ['fake_block' => ['fake_custom'], 'fake_node' => ['fake_article', 'fake_page']],
+      $workflow_plugin->getConfiguration()['entity_types']
+    );
+  }
+
 }