It "loads" the page but it doesn't truly "load" anything other than the title or headline of the post. Comments don't load even at the most basic level (ad protection or intelligent yadayada yada
Are you sure this is a Kagi thing? Maybe it's a reddit or browser thing. Or some weird combo of all of that.
Edit: this also applies to submitting feedback although theres some JS connection here also
As another poster pointed out, maybe you should contact the people at Kagi about this.