I was surfing through the website and I found out this major issue in which when I filter a list (suppose for React) by a category then it gets highlighted correct and a number is shown beside it showing the number of nodes present in it.
In this case A11y:

But after scrolling down, I can get only 11 nodes (including 1 Advertisement node) in total, as there aren't any other pages available.
Take a look at the image shown below for reference:

The problem might be in the count given beside the category, or it will be in the pagination which is causing the user to not be to traverse all the pages.