[4.1] Responsive Design: closing navigation menu redirects to home page

I am using version 4.1.2, deployed in docker on kubernetes. Since upgrading to v4.1 the navigation on my mobile devices is broken. This happens when the screen resolution causes the responsive design to collapse the navigation menu into the "hamburger button" access mode. While the navigation menu is unfolded and hovering above the main content, I can select sub-pages and see them loading behind the menu. When the navigation menu is closed to interact with the page, a page reload is triggered which immediately takes me back to the home page.

This can be reproduced with Firefox in mobile device simulation, without actually having to use a mobile device.

Steps to reproduce:

1. Open the main page in Firefox, press Ctrl+Shift+M to switch to mobile simulation mode. Make sure that the screen resolution is low enough for the navigation menu to be collapsed. For me the default resolution of 320x480 works fine.
   
2. Open the navigation menu and choose a sub-page, for example "Documents -> New document". Watch the page load behind the menu.
   
3. Close the navigation menu with the double left arrow to access the input form, or tap somewhere outside of the menu.
   

Expected result: The chosen page stays open and the user can start to fill in the new document form.

Actual result: A reload is triggered which takes the user back to the home page. It is not possible to upload a new document with the responsive design.

Workaround: some mobile browsers offer a "desktop mode" where the navigation menu is not collapsed, in this mode it is possible to navigate the pages.