Language switching anomaly

I am using the Polylang free version with Elementor Pro on a website I created several years ago. I did contribute at that time but, since this is the only dual-language site I have done, I did not update to Pro.

Polylang works seamlessly with one exception. I am not using it to do translating, I am only using it to switch between English and Deutsch pages.

The website has a menu with six options:
English = Home, Editorial services, Working with me, Selected projects, Client comments, About me
Deutsch = Willkommen, Redaktionelle Dienstleistungen, Die Zusammenarbeit mit mir, Ausgew?hlte Projekte, Kundenkommentare, Zu meiner Person

When switching between English and Deutsch each page switches to its counterpart page of the alternate language perfectly, except for Selected projects and it counterpart Ausgew?hlte Projekte. When switching languages from either Selected projects or its counterpart Ausgew?hlte Projekte, you are always returned to the first menu item Home or Willkommen, not its counterpart.

Please see the website https://katharineschmidteditorial.com/ to see what happens when switching between languages.

How do I fix this? I want Selected projects and Ausgew?hlte Projekte to switch back and forth between English and Deutsch the same as all the other menu options.

I love Polylang and if I have another client that needs multiple languages, I will use it again and this time purchase Pro.

Thank you in advance for your answer,

Jim Palik

The page I need help with: [log in to see the link]