Ques/Help Does the Unanswered Questions list only contain unread threads?

[Stuart Wright]

Looking at this functionality and it appears to only be showing unread threads.
https://xenforo.com/community/find-threads/unanswered
Is this correct?
If I read a thread and then refresh, the thread is still listed but not bold, so marked as read. I'm guessing this is cache?

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