How to stop Yii2 from deleting cookies?

Question

Yii

Bottom line: Yii2 deletes all cookies and sessions after a while, although the lifetime is 3600*24*30*12 - which is confirmed when viewing cookies in the browser. Removes both PHPSESSID and any others on the domain
My config:

'session' => [
            'class' => 'yii\web\Session',
            'cookieParams' => ['httponly' => true, 'lifetime' => 3600*24*30*12],
            'timeout' => 3600*24*30*12,
            'useCookies' => true,
        ],
'request' => [
            'enableCookieValidation' => false,
            'enableCsrfValidation' => true,
            'cookieValidationKey' => 'секретка',
        ],

Validation turned off. I tried to ask via setcookie directly. I couldn’t track the moment of deletion, but it comes some time after the client’s inactivity, about 20 minutes.
I also found out that all cookies are deleted if you manually delete PHPSESSID.