Only notify on notes REST insert

Author: adamsilverstein

src/wp-includes/comment.php

@@ -2457,6 +2457,19 @@ function wp_new_comment_notify_postauthor( $comment_id ) {
 	return wp_notify_postauthor( $comment_id );
 }
 
+/**
+ * Send a notification to the post author when a new note is added via the REST API.
+ *
+ * @since 6.9.1
+ *
+ * @param WP_Comment $comment The comment object.
+ */
+function wp_new_comment_via_rest_notify_postauthor( $comment ) {
+	if ( 'note' === $comment->comment_type ) {
+		wp_new_comment_notify_postauthor( $comment->comment_ID );
+	}
+}
+
 /**
  * Sets the status of a comment.
  *

src/wp-includes/default-filters.php

@@ -522,7 +522,7 @@
 // Email notifications.
 add_action( 'comment_post', 'wp_new_comment_notify_moderator' );
 add_action( 'comment_post', 'wp_new_comment_notify_postauthor' );
-add_action( 'rest_insert_comment', 'wp_new_comment_notify_moderator' );
+add_action( 'rest_insert_comment', 'wp_new_comment_via_rest_notify_postauthor' );
 
 add_action( 'after_password_reset', 'wp_password_change_notification' );
 add_action( 'register_new_user', 'wp_send_new_user_notifications' );