Post slider defect

Without having experienced an update or even having changed anything (no new plugins), the post slider on my site no longer works. Only some of the posts are still displayed. The category that is set, however, has considerably more. Before, everything was displayed perfectly. When I change the display from “category” to “recent posts”, the same thing happens. The rest of the posts are missing.

I have now deactivated the function because it looks impossible, but I have attached a screenshot. Please help.

I still have another problem, but I will discuss that in a separate post.

Cya, Jay

https://www.jayden-v-reeves.co.uk/wp-content/uploads/2023/08/Opera-Momentaufnahme_2023-08-08_081515_www.jayden-v-reeves.co_.uk_.png

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