Snippet to treat cancelled and failed orders as abandoned carts.

cancelled_as_abandoned.php

add_filter('rnoc_abandoned_cart_order_status','rnoc_abandoned_cart_order_status',10,2);
function rnoc_abandoned_cart_order_status($order_status,$order){
	if(in_array($order_status,array("cancelled","failed"))){
		$order_status = "pending";
	}
	return $order_status;
}