It’s been a known bug for years. It started after an upgrade of the bbPress forum software on this site about four or five years ago. Before that the issue didn’t exist. And apparently there have been no bbPress upgrades here since then with a version that got rid of the bug.
Another bug introduced during that same upgrade was you are no longer logged in to the CR and the main site simultaneously. Previously if you were logged into one, you were automatically logged into both. Now it’s one or the other; logging into one automatically logs you out of the other.
Another bbPress upgrade would fix both of those (and other) issues. [Another bug introduced with said upgrade was the “Member” link under everyone’s screen name used to automatically link to their real profile irregardless whether the screen name was different than the username.]
gosh, lior! you sure learned a lot in 7 months 🙂