@hermanschaaf @aemsley @mromaine 
There is this suspicious looking code in controllers/work/job_group.php around line 617.
```php
           $order_meta = $this->Order_model->_get_order_meta($order_id);
            $allow_fork = ($order_meta !== FALSE) ? $order_meta->allow_fork : TRUE;

            // Send an email to customer to decide to cancel the rest or create another grouped order
            // depending on whether forking is allowed or not.
            if( $allow_fork )
            {
                $this->translate_library->grouped_order_worker_cancel($job_group_id);
            }
            else
            {
                $this->translate_library->grouped_order_cancel_remaining($job_group_id, FALSE);
            }
```