diff --git a/core/modules/system/src/Plugin/Block/SystemPageMessagesBlock.php b/core/modules/system/src/Plugin/Block/SystemPageMessagesBlock.php
index f532c03..8212395 100644
--- a/core/modules/system/src/Plugin/Block/SystemPageMessagesBlock.php
+++ b/core/modules/system/src/Plugin/Block/SystemPageMessagesBlock.php
@@ -30,6 +30,13 @@ class SystemPageMessagesBlock extends BlockBase implements ContainerFactoryPlugi
   protected $configFactory;
 
   /**
+   * The messages.
+   * They are stored in a static property so they can appear in multiple blocks.
+   *
+   */
+  protected static $messages;
+
+  /**
    * Creates a SystemPageMessagesBlock instance.
    *
    * @param array $configuration
@@ -94,7 +101,10 @@ public function build() {
    * @return mixed
    */
   public function getMessages($element) {
-    $element['#message_list'] = drupal_get_messages();
+    if (!isset(static::$messages)) {
+      static::$messages = drupal_get_messages();
+    }
+    $element['#message_list'] = static::$messages;
     return $element;
   }