Private Policy page appears as popup

Hi,

I use the Polylang plugin with woocommerce. When I use the Firefox browser and switch at the checkout page with the language switcher from German to English I get the Cash page and then the Private Policy page as popup. Very strange that you get a Woocommerce page as popup! When I block the popup feature in Firefox the popup does not appear. The additional strange thing is, when I use the Chrome and Edge browsers and allow popups the popup does NOT appear.

Can anyone explain me what’s going on here? It would be nice if you could help me. Otherwise I’d have to use another ecommerce plugin.

Thanks in advance for your help.

Best regards

Albert