I could be wrong, but I think in most cases they are not able to reproduce a problem as described, and are referring it to Support either to resolve the user/usability/configuration issue or to clarify the steps that expose an actual bug.
That said, I was able to easily reproduce an issue a couple days ago with another user's project submitted with a bug that was incorrectly referred back to Support. So that
does happen, but I think you have to give the Bakers the benefit of the doubt that it's just garden-variety mistake/misunderstanding if it actually
is a bug, or that you might actually be mistaken about that, yourself, or haven't sufficiently clarified the conditions that reliably reproduce the bug. This happens a lot as many bugs are dependent on a particular project or content or settings or 3rd-party plugins.
In any case, I'd be interested to see what was submitted in this particular case.