diff -u b/menu_block.module b/menu_block.module
--- b/menu_block.module
+++ b/menu_block.module
@@ -115,15 +115,8 @@
   if (isset($variables['content']['#menu_block_configuration']['label'])) {
     $config_label = $variables['content']['#menu_block_configuration']['label'];
-    // Some block twig templates (especially classy + bartik from core) use
-    // `{{ configuration.label }}` to print the label. Others just use
-    // `{{ label }}`. Therefore, we have to set both template variables for
-    // this to work consistently.
+    // Label is set to empty string unless configured to be visible.
     $variables['label'] = !empty($variables['configuration']['label_display']) ? $config_label : '';
-  }
-  // Even without $variables['content']['#menu_block_configuration']['label'] we
-  // need to change the label. For example, this happens when there are no menu
-  // items to render. But we still need to set the block label.
-  if (isset($variables['label'])) {
-    $variables['configuration']['label'] = $variables['label'];
+    // Configuration label is set regardless.
+    $variables['configuration']['label'] = $config_label;
   }
 }