CodeIgniter with Ion AUTH login not remembered

Question

I'm working on CodeIgniter login with ION auth plugin. I don't know why, but I have this behavior: I fill login form, send it, user is matched, CI save this data into "user_data" column in default_ci_sessions table and I reload page and user is still not logged in and in table default_ci_sessions is created new row with empty "user_data" column. Do you know, where might be problem? Here is my config for sessions:

$config['sess_cookie_name']     = 'pyrocms' . (ENVIRONMENT !== 'production' ? '_' . ENVIRONMENT : '');
$config['sess_expiration']      = 0;
$config['sess_expire_on_close'] = TRUE;
$config['sess_encrypt_cookie']  = TRUE;
$config['sess_use_database']    = TRUE;
// don't change anything but the 'ci_sessions' part of this. The MSM depends on the 'default_' prefix
$config['sess_table_name']      = 'default_ci_sessions';
$config['sess_match_ip']        = TRUE;
$config['sess_match_useragent'] = TRUE;
$config['sess_time_to_update']  = 300;

Solved. I need to set cookie settings to this:

$config['cookie_prefix']    = "";
$config['cookie_domain']    = "";
$config['cookie_path']      = "";

Answer 1

I can see that you answered the problem yourself, but to add a solution to make it easier to find for others with the same problem, I have added it here with some more explanation for why it is the solution.

Your Full code:

$config['sess_cookie_name']     = 'pyrocms' . (ENVIRONMENT !== 'production' ? '_' . ENVIRONMENT : '');
$config['sess_expiration']      = 0;
$config['sess_expire_on_close'] = TRUE;
$config['sess_encrypt_cookie']  = TRUE;
$config['sess_use_database']    = TRUE;
$config['sess_table_name']      = 'default_ci_sessions';
$config['sess_match_ip']        = TRUE;
$config['sess_match_useragent'] = TRUE;
$config['sess_time_to_update']  = 300;

//Added code to fix issue 
$config['cookie_prefix']    = "";
$config['cookie_domain']    = "";
$config['cookie_path']      = "/";

• $config['cookie_prefix'] Sets a prefix if you need to avoid collisions
• $config['cookie_domain']; Set to .your-domain.com for site-wide cookies
• $config['cookie_path']; Typically will be a forward slash

setting each equal to "" pretty much makes sure that cookies are set for the entire domain.