Index: src/js/_enqueues/admin/common.js
===================================================================
--- src/js/_enqueues/admin/common.js	(revision 53451)
+++ src/js/_enqueues/admin/common.js	(working copy)
@@ -617,7 +617,7 @@
 		 * @return {void}
 		 */
 		panel.slideDown( 'fast', function() {
-			panel.trigger( 'focus' );
+			panel.removeClass( 'hidden' ).trigger( 'focus' );
 			button.addClass( 'screen-meta-active' ).attr( 'aria-expanded', true );
 		});
 
@@ -646,6 +646,7 @@
 			button.removeClass( 'screen-meta-active' ).attr( 'aria-expanded', false );
 			$('.screen-meta-toggle').css('visibility', '');
 			panel.parent().hide();
+			panel.addClass( 'hidden' );
 		});
 
 		$document.trigger( 'screen:options:close' );