And again, this time the title bar presents the name of the forum (not the name of the post to which the user is redirected):
The problem seems to be fairly easily reproducible.
Maybe more likely when:
• two or more tabs are loading concurrently
and/or
• a link from the referring tab is command-clicked a
second time (may always open a new tab, without regard for an existing tab that presents the redirected result of the
first command-click).