The blog post is mentioned in the first linked article. Needless to say I fundamentally disagree with Apple's decision* - If I explicitly install a firewall, I want it to actually function like a firewall and not let some packets through. The overhead explanation seems a bit like a stretch.

* It's actually not clear whether this is a feature or a bug. Apple never responded to the bug report (FB12088655).

Yeah it seems going to https://feedbackassistant.apple.com/feedback/12088655 the report doesn't even exist anymore.

Would be good to get an official answer from Apple if this is won't fix or coming as a fix in a future release.

> Yeah it seems going to https://feedbackassistant.apple.com/feedback/12088655 the report doesn't even exist anymore.

That link is for Apple engineers. Feedback reports are not public. They're only accessible by the reporter and Apple.