The !hn bang, used to search Hacker News, does not pass the address term correctly.
"!hn foo" does not list stories containing "foo", but instead all stories.
For the term "foo", this is the correct search URL:
https://hn.algolia.com/?query=Foo
However Kagi currently uses this:
https://hn.algolia.com/#!/story/forever/0/foo
Which does not utilise the search term in the results.