I just notices that my post grids just show all posts on my website now rather than the categories that I linked with them before. For instance the Namibia post now also shows posts under the category of USA. I can no longer change the categories in the Edit post grid option - how can I make sure each post grid again only shows the posts that were linked to a specifc category?
Welcome to our forum.
you might be updated post grid recently, after update plugin you should see data update notice at the top. please see the screenshot
you can also manually set categories from "Post Taxonomies & terms", please see the screenshot.
you can watch the following video to learn more about new category selection.