diff --git a/core/modules/system/lib/Drupal/system/Controller/SystemController.php b/core/modules/system/lib/Drupal/system/Controller/SystemController.php
index 5f55d6e..a766055 100644
--- a/core/modules/system/lib/Drupal/system/Controller/SystemController.php
+++ b/core/modules/system/lib/Drupal/system/Controller/SystemController.php
@@ -137,12 +137,10 @@ public function overview() {
           );
 
           if (!empty($block['content']['#content'])) {
-            $block['show'] = TRUE;
+            // Prepare for sorting as in function _menu_tree_check_access().
+            // The weight is offset so it is always positive, with a uniform 5-digits.
+            $blocks[(50000 + $item['weight']) . ' ' . $item['title'] . ' ' . $item['mlid']] = $block;
           }
-
-          // Prepare for sorting as in function _menu_tree_check_access().
-          // The weight is offset so it is always positive, with a uniform 5-digits.
-          $blocks[(50000 + $item['weight']) . ' ' . $item['title'] . ' ' . $item['mlid']] = $block;
         }
       }
     }
diff --git a/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
index ea664dd..c14fb09 100644
--- a/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -191,7 +191,6 @@ function theme_system_admin_index($variables) {
       $block['title'] = $module;
       $block['content'] = drupal_render($admin_block_content);
       $block['description'] = t($description);
-      $block['show'] = TRUE;
 
       $admin_block = array(
         '#theme' => 'admin_block',
diff --git a/core/modules/system/templates/admin-block.html.twig b/core/modules/system/templates/admin-block.html.twig
index 4c305c2..20aa000 100644
--- a/core/modules/system/templates/admin-block.html.twig
+++ b/core/modules/system/templates/admin-block.html.twig
@@ -14,15 +14,13 @@
  * @ingroup themeable
  */
 #}
-{% if block.show %}
-  <div class="admin-panel">
-    {% if block.title %}
-      <h3>{{ block.title }}</h3>
-    {% endif %}
-    {% if block.content %}
-      <div class="body">{{ block.content }}</div>
-    {% elseif block.description %}
-      <div class="description">{{ block.description }}</div>
-    {% endif %}
-  </div>
-{% endif %}
+<div class="admin-panel">
+  {% if block.title %}
+    <h3>{{ block.title }}</h3>
+  {% endif %}
+  {% if block.content %}
+    <div class="body">{{ block.content }}</div>
+  {% elseif block.description %}
+    <div class="description">{{ block.description }}</div>
+  {% endif %}
+</div>