Please make sure to log this at http://bugreporter.apple.com Your bug will at least then be triaged and acknowledged.
They take forever to answer, and ask for things that you have already provided in your original issue. When you try to reproduce the bug on multiple versions, they close your bug if you reproduced it on beta versions, because beta versions are unsupported, even though the bug affects release versions. Sometimes this happens even if they asked you to try the beta version!
The bugs are almost always closed as duplicate of another bug, which, of course, you can't see because the bug tracker is private.
The bugs are never fixed, at least no bug that I have ever reported has been fixed. Years or months later after submitting a bug that happens not to be closed as duplicate of another bug, they get closed because a new version of macOS is released, and you are encouraged to resubmit your report if it still affects the new version, which inevitably it does...
Even if the bug is in some open source component, and you provide a patch, it is ignored and eventually closed as explained above.
It's a total waste of time and a pain in the ass to submit bugs to Apple.