Hi Robert Grießbach,
Thank you for your response.
I have carefully tested the slideshow functionality in our local environment using SPPB 5.4.4, and it is working fine on both the homepage and additional pages.
However, I do not want to install SPPB 5.4.4 on your live site without your confirmation. Since you mentioned that your site is for a customer, please ensure you have a full backup using 'akeeba backup' before proceeding.
Additionally, could you please provide a screenshot of the issue you are experiencing with the slideshow in SPPB 5.4.4? This will help me better understand and troubleshoot the problem.
Best regards