Codeigniter session values lost on redirect MacOS

Question

I have an online application which has been running for couple of years
Codeigniter 3.1.11, PHP 7.2
I have added an online feature for clients so they can use it on their website by using an iframe

Everything works fine on Windows platform or android OS, but under MacOS it seems that session values are lost when the page is redirected

redirect('client/index', 'refresh');

If I display the view directly then the session values are kept, but unfortunately, I have to use the redirect method

$this->load->view('client/index', $this->data);

Here is the config part which might be useful to know

$config['sess_driver'] = 'files';
$config['sess_cookie_name'] = 'ci_session';
$config['sess_expiration'] = 7200;
$config['sess_save_path'] = NULL;
$config['sess_match_ip'] = FALSE;
$config['sess_time_to_update'] = 300;
$config['sess_regenerate_destroy'] = FALSE;

$config['cookie_prefix']    = '';
$config['cookie_domain']    = '';
$config['cookie_path']      = '/; SameSite=None';
$config['cookie_secure']    = TRUE;
$config['cookie_httponly']  = FALSE;

And here is what session looks like after login and before the redirect page

Array
(
    [__ci_last_regenerate] => 1628374247
    [logged_in] => 1
    [csid] => 16196
    [csname] => customer
    [clname] => client
    [clid] => 115
)

And this is what the session after the redirect page

Array
(
    [__ci_last_regenerate] => 1628374247
    [logged_in] => 
)

When a page is loaded, there will be validation on some of the session values, once I try to login using Mac Pro or IPhone with both Safari or Chrome, it redirects back to the login page as the session values already lost. As I mentioned before, same exact code works fine on Windows and Android OS!
If I try to login directly from my website not via client's website "iframe", it works fine using MacOS on both Safari and Chrome.
I am not sure why MacOS behave this way when an iframe used to embed another website!
Any feedback or suggestions are highly appreciated.

Codeigniter session values lost on redirect MacOS

0 Answers