Restoring highlights not working on a Moodle website

[bemmim]

Hello,
I try to use Highlighter on https://energieberatung.elearning-home.de/, but it will not display highlights after reloading a page. The portal uses dynamic php web pages, URL ending "view.php?id=2226&chapterid=2598" for example. On static web pages the highlights are shown also after reloading.

I use Chrome version Version 109.0.5414.120 and Highlighter version 4.0.4 on Windows 11.

Hope someone can help. Just tell me if you need more information.