Having problem with session library (CI4)

Does CI4 session library built is still progress, I'm having problem with logger when using session;

1) After this commit https://github.com/bcit-ci/CodeIgniter4/...6835fb03bf, no changes have been made in /system/Session/Session.php (line 40 & 51) and /system/Session/Handlers/BaseHandler.php (line 40 & 47).

2) Problem with /system/Session/SessionInterface.php, declaration of /system/Session/Session.php not compatible with /system/Session/SessionInterface.php: has(), getFlashdata() and keepFlashdata(). And no abstract method of initialize() in /system/Session/Session.php

Solve the problem(comment some logger line & etc) in my local ci4, hope will be fixed soon.

Keep calm.