All browser to some extent do this if you close the tab or browser it logs you out of the site but if password manager is active then you click the correct login and pswd to login to the site again. If it doesn't list or give the login options then you need to check your password manager and check to see if it is "Remembering the Login" option is check to save the login. And if you don't click to save Login option then the browser will not save any Login and you have to manually re-enter all login/pswd to get to the sites again.