Hey Hayden, merry Christmas from Auckland.
In general this is the solution I use;
$("a[href^='#']").click(function() {
$(this).closest("nav").removeClass("w--open");
$(this).closest("div.w-dropdown-toggle").removeClass("w--open");
});
Which I’ve documented here.
However in your case, you’ve extensively customized your menu with a lightbox-type effect and interactions. I can see you’ve tried a hard external URL redirect, and also that it’s not done the trick.
Your best option now is probably to add a bit of custom script so that when you click your menu item, the top-right close button is clicked, and then the anchor scroll is performed by script.
If you need some a dev to asst, fell free to PM me, I’m working through the holidays this year.