Archive hreflang and switcher not working

[lloc]

The switcher is working for all kind of pages (pages, posts, woocommerce products), but not for archives. It shows an empty href.

F.E. https://www.site.com/nl/category-a:

<link rel="alternate" hreflang="en" href="" title="English" />
<link rel="alternate" hreflang="nl" href="https://www.site.com/nl/" title="Nederlands">

[lloc]

Reopened because of additional information:

https://wordpress.org/support/topic/archive-hreflang-and-switcher-not-working/