Index: src/wp-includes/js/tinymce/plugins/wordpress/plugin.js
===================================================================
--- src/wp-includes/js/tinymce/plugins/wordpress/plugin.js	(revision 37557)
+++ src/wp-includes/js/tinymce/plugins/wordpress/plugin.js	(working copy)
@@ -902,7 +902,12 @@
 				if ( activeToolbar.tempHide || event.type === 'hide' ) {
 					activeToolbar.hide();
 					activeToolbar = false;
-				} else if ( ( event.type === 'resize' || event.type === 'scroll' ) && ! activeToolbar.blockHide ) {
+				} else if ( (
+					event.type === 'resizewindow' ||
+					event.type === 'scrollwindow' ||
+					event.type === 'resize' ||
+					event.type === 'scroll'
+				) && ! activeToolbar.blockHide ) {
 					clearTimeout( timeout );
 
 					timeout = setTimeout( function() {
@@ -918,11 +923,13 @@
 			}
 		}
 
-		DOM.bind( window, 'resize scroll', hide );
+		// For full height editor.
+		editor.on( 'resizewindow scrollwindow', hide );
+		// For scrollable editor.
 		editor.dom.bind( editor.getWin(), 'resize scroll', hide );
 
 		editor.on( 'remove', function() {
-			DOM.unbind( window, 'resize scroll', hide );
+			editor.off( 'resizewindow scrollwindow', hide );
 			editor.dom.unbind( editor.getWin(), 'resize scroll', hide );
 		} );