By default in APEX 5.1 (Universal Theme), you have to close client-side messages manually or they disappear as you leave/submit page. If you want to auto hide them call this JS code: ```js apex.message.setThemeHooks({ beforeShow: function(pMsgType, pElement$){ setTimeout(function() { $('.t-Alert').fadeOut('slow'); }, 3000); } }); ``` For details read the blog post.