Session data lost after route redirect

the only session stuff i care or bother with  is  when  admin gui  is accessed and admin logs in, or  somebody attempts to log in . I have  a few methods in a class  and several views. I just put this line at the top of every  method in the class

Code:

$session = \Config\Services::session();

eg

Code:

public function displaySession()
 
  {
 
 
  $session = \Config\Services::session();
  if( isset($_SESSION['role']))
 
  {
 
 
 
  echo " S_session[role] is :".$_SESSION['role'];
 

  }
 
  else
  {
  echo "session role not set";
 
  }
 
 
 
 
 
  }

session info doesn't seem to get lost, even when a view displays form , data is collected from submission etc , picked up by another method its still there .The only thing that clears data is a URL logout ,which is picked up via routes .code is :

Code:

  public function logout()
              {
             
             
$session = \Config\Services::session();
             
             
                unset($_SESSION['role']);
                unset($_SESSION['count']);
             
      $data= [
      'title'=> 'logout',
      'info'=> 'you may have already been logged out, but if you were not you are now !' ,
      'date'=>$this->myDate
     
     
     
      ];
     
     
     
        echo view('info', $data);

thank you