Session is sometimes closed at this point

[PhoenixFnX]

https://github.com/simplesamlphp/simplesamlphp/blob/a499a8a39e5572b7d80b8c182b06f9ec129133ac/src/SimpleSAML/SessionHandlerPHP.php#L237C5-L237C5

I'm developping an app with a custom session handler.
So I had to implement the handler reset :

// close session and restore default handler
session_write_close();
session_set_save_handler(new SessionHandler());

Then when I logout (but I can see a login problem too),
the session is clear of authData and this function saveSession is called.

It appears at this point the session_status() is PHP_SESSION_NONE.

I resolved my problem adding a session start at this point:

public function saveSession(\SimpleSAML\Session $session)
{
    @session_start();
    $_SESSION['SimpleSAMLphp_SESSION'] = serialize($session);
}

[tvdijen]

What happens if you try the following?:

// close session and restore default handler
session_write_close();
session_set_save_handler(SessionHandler::getSessionHandler());