User logged twice

For some reason, the same user was logged in twice in the same browser. In the Session table, two entries were created for the same user. When I logout the user, one entry was erased, but the second onde remained. I gave a console.log and the currentUser was null. I closed and opened the browser, and the currentUser reappeared, probably due to the other entry in the Session table. When I logged out the user for the second time, the second record disappeared. Is this normal?

something seems strange, but a user can login twice

i have the same problem in _User table there are multiple entries for a single user

it looks like accounts is not set for those users on your server.
first, you should update the server to the latest version, it is since 6 weeks ago

what do you use to authenticate?