Ticket #4889: 4889.patch

_source/plugins/newpage/plugin.js

@@ -21 +21 @@
                                         var command = this;
                                         editor.setData( editor.config.newpage_html, function()
                                         {
-                                                editor.fire( 'afterCommandExec',
-                                                {
-                                                        name: command.name,
-                                                        command: command
-                                                } );
+                                                // Save the undo snapshot after all document changes are affected. (#4889)
+                                                setTimeout( function ()
+                                                {
+                                                        editor.fire( 'afterCommandExec',
+                                                        {
+                                                                name: command.name,
+                                                                command: command
+                                                        } );
+                                                        
+                                                }, 200 );
                                         } );
                                         editor.focus();
                                 },