session does not correct work on linux

@gangaa,

Is PHP7 configured the same on both servers?

yes same 

Codeigniter ver3.1.7 on linux OS server  and PHP7
Codeigniter var3.1.1 on window10 OS server and PHP7

config is same both servers
$config['sess_driver'] = 'files';
$config['sess_cookie_name'] = 'cisession';
$config['sess_expiration'] = 7200;
$config['sess_save_path'] = sys_get_temp_dir();
$config['sess_match_ip'] = FALSE;
$config['sess_time_to_update'] = 300;
$config['sess_regenerate_destroy'] = TRUE;