diff --git src/wp-admin/js/widgets/text-widgets.js src/wp-admin/js/widgets/text-widgets.js
index 2108b65548..240b54f566 100644
--- src/wp-admin/js/widgets/text-widgets.js
+++ src/wp-admin/js/widgets/text-widgets.js
@@ -184,7 +184,7 @@ wp.textWidgets = ( function( $ ) {
 							}, updateWidgetBuffer );
 						}
 
-						editor.save();
+						editor.save({ no_events: true }); // Arg no_events to prevent infinite SaveContent loop.
 						textarea.trigger( 'change' );
 					}
 				};
@@ -192,7 +192,13 @@ wp.textWidgets = ( function( $ ) {
 					control.editorFocused = true;
 				});
 				editor.on( 'NodeChange', _.debounce( triggerChangeIfDirty, changeDebounceDelay ) );
-				editor.on( 'blur', function() {
+
+				/*
+				 * Note that originally the 'blur' event was used below. It had to be
+				 * replaced with 'SaveContent' because the 'blur' event does not trigger
+				 * when the user switches to the Text tab.
+				 */
+				editor.on( 'SaveContent', function() {
 					control.editorFocused = false;
 					triggerChangeIfDirty();
 				});