CI 3 Session - sess_match_ip only for REMOTE_ADDR?

Hello everyone,
just a question to understand why in the session_drivers, when the config var 'sess_check_ip' is set to TRUE, 

PHP Code:

//config.php
$config['sess_match_ip'] = TRUE; 


is considered only the $_SERVER['REMOTE_ADDR'] 

PHP Code:

// Session_files_driver.php
$this->_file_path = $this->_config['save_path'].DIRECTORY_SEPARATOR
            .$name // we'll use the session cookie name as a prefix to avoid collisions
            .($this->_config['match_ip'] ? md5($_SERVER['REMOTE_ADDR']) : ''); 


and not the other headers like 'HTTP_X_FORWARDED_FOR' (maybe calling the input->ip_address() funcion).

This can cause issues when on server with a loadbalancer that can serve the site from different ip addresses.

Thank you

This is by design and won't change.

To match client ip with their current session. If you deploy on server with a load balancer please consider use database,redis or memcache as session driver

This is completely irrelevant.