This PR (#24774), specifically, this change (https://github.com/symfony/symfony/pull/24774/files#diff-e8f5b14fbfbbeac60fc9f3abe310c3b0L318) is causing an issue in a functional test.

My test logs a user in, ensures they are logged in, then expires the session via $client->getCookieJar()->expire('MOCKSESSID'). I then visit another page and ensure the user is not logged in. It worked as expected without this change but the user is still logged in after this change.

My test env is using MockFileSessionStorage and I am using $client->disableReboot().