diff --git a/src/wp-content/themes/twentytwentyone/inc/template-functions.php b/src/wp-content/themes/twentytwentyone/inc/template-functions.php
index 529564c295319..57281b128a981 100644
--- a/src/wp-content/themes/twentytwentyone/inc/template-functions.php
+++ b/src/wp-content/themes/twentytwentyone/inc/template-functions.php
@@ -182,11 +182,16 @@ function twenty_twenty_one_continue_reading_link() {
 	 * Adds a title to posts and pages that are missing titles.
 	 *
 	 * @since Twenty Twenty-One 1.0
+	 * @since Twenty Twenty-One 2.9 Only applies the filter on the front end.
 	 *
 	 * @param string $title The title.
 	 * @return string
 	 */
 	function twenty_twenty_one_post_title( $title ) {
+		if ( is_admin() ) {
+			return $title;
+		}
+
 		return '' === $title ? esc_html_x( 'Untitled', 'Added to posts and pages that are missing titles', 'twentytwentyone' ) : $title;
 	}
 }