MAGETWO-37818: Customer invalid email message is not displayed

Author: okarpenko

lib/web/mage/backend/notification.js

@@ -52,7 +52,7 @@ define([
             var message = mageTemplate(template, {
                 data: data
             });
-            var messageContainer = data.messageContainer || '.messages';
+            var messageContainer = data.messageContainer || '.messages:first';
             $(messageContainer).prepend(message);
             return this;
         },