WP Post status action hooks not triggering

Hi!

When updating a custom post type (“performance”) using the GF updater plugin, a function I wrote to notify the admin when a published performance is changed does not fire. It does fire when editing the performance directly in the backend.

Here’s the function:

//send admin email when a published performance is changed by user
function bits_performance_update_notification( $new_status, $old_status, $post ) {
    if ( $old_status == 'publish'  &&  $new_status == 'publish' && get_post_type($post) == 'performance' ) {
		$post_url = get_permalink( $post->ID );
		$subject = 'A published performance has been changed';
		$message = "The following performance was changed:\n\n";
		$message .= $post->post_title;
		$message .= $post_url;
		$email = [email protected] ;
		//sends email
		wp_mail($email, $subject, $message );
		}
}
add_action( 'transition_post_status', 'bits_performance_update_notification', 10, 3 );

Any assistance would be appreciated. Thank you!

https://ww.wp.xz.cn/plugins/gravity-forms-post-updates/