I looked at this on my environment and can reproduce the issue. It appears the logic to show this never really worked, that's a bug.
https://github.com/NodeBB/NodeBB/issues/8611
That's been fixed, you can cherry-pick this commit and try again
https://github.com/NodeBB/NodeBB/commit/64a457a441f38bc1f0d2f536ed303b7ff37684ae