And yet it completely shits itself when opened in an Android WebView ("An unknown error has occured"). It's not that it can't render - it flashes the site for half a second, then decides to delete itself and just show the error.
Do you have steps to repro this? I can attempt to fix it.
I opened the page with the Androind HN app "Materialistic". I believe it uses the default Android WebView to display the linked website. I don't have any experience debugging things inside a WebView so I unfortunately can't help you much more than that.