A bug report I posted earlier today (Search fails to find matching issues) was just closed due to being "off-topic".
This is despite the fact that it is a very clear, easy to reproduce bug affecting a core feature of this site, for which I have outlined clear reproduction steps.
This bug affects search, and can potentially prevent users from finding questions that have already been asked. This will lead to an increase in the number of duplicate questions, which is a frustrating experience for the poster, and a waste of time for question reviewers.
So what exactly is it about this bug report that makes it off-topic? What justification is there for closing a bug report on an issue that affects core functionality of this site, and prevents users from finding questions that have already been asked?