Site key issues

Hi. Thanks for this plugin, exactly what I need.

I have a staging site set up for client approval, not linked here as it’s not yet approved. Built with GeneratePress, everything fully up to date.

It’s a one page site (plus a privacy policy page) so all the menu links aside from the privacy policy are on-page (#). The access key allows the page to load but clicking any of the # links (which all have the full URL plus the # for a given section), despite them all being sections on the same page, brings me to the maintenance message.

The privacy policy page loads as expected but then I can’t get back to the home page, just the maintenance message again.

Is this expected behaviour? Any workaround or settings change to accomplish what I’m needing?

It’s not the end of the world as the page can be manually scrolled to review the content but it would be good if the client could use the menu and see how that works. I realise I can whitelist their IP if needed, I’m just confused as I thought the access key sets a cookie which should then enable the non-logged in user to see any part of the site?

TIA