Steps to reproduce:
1.) Log in as an administrator
2.) Open a new tab to any post
3.) Return to the original tab and log out
4.) Return to the second tab and attempt to do things such as Pinning or closing the topic
5.) Observe the results
Logging out does not prevent the administrative actions from appearing to occur in that tab. While these actions are ineffective (pinning a topic doesn’t actually pin it) it appears to the user that the changes are being made - this could lead to confusion if an admin logs out with one tab and returns at a later point to the tab where they are logged in - especially as you are able to change pages and still remain in this state.
After logging out the sessions for other tabs should become invalid and any actions taken that a regular user cannot perform should result in an error.