fake page doesn’t work with WP 6.1

Solved with

function detect_fake_shortlink($return, $id, $context, $allow_slugs) {
	$url = isset($_SERVER["SCRIPT_URL"]) ? $_SERVER['SCRIPT_URL'] : "";
	if (strpos($url, "/fakeslug/") !== false ) {
		return true;
	}
	return $return;
}
// add the filter
add_filter( "pre_get_shortlink", "detect_fake_shortlink", 10, 4 );

But now and even before is still the error:
PHP Warning: Attempt to read property "post_parent" on null in /wp-includes/post-template.php on line 724

Set

		$wp_query->is_page             = false;
		$wp_query->is_singular         = false;