diff --git a/src/wp-includes/js/mce-view.js b/src/wp-includes/js/mce-view.js
index d2c29f7e88..10e33cc3b0 100644
--- a/src/wp-includes/js/mce-view.js
+++ b/src/wp-includes/js/mce-view.js
@@ -539,6 +539,14 @@
 						dom.add( node, 'span', { 'class': 'wpview-end' } );
 					} );
 
+					// Bail if the iframe node is not attached to the DOM.
+					// Happens when the view is dragged in the editor.
+					// There is a browser restriction when iframes are moved in the DOM. They get emptied.
+					// The iframe will be rerendered after dropping the view node at the new location.
+					if ( ! iframe.contentWindow ) {
+						return;
+					}
+
 					iframeDoc = iframe.contentWindow.document;
 
 					iframeDoc.open();