Unable to locate strange redirects

For now, you can try using this PHP code to set a permanent redirect to the homepage when the slug matches the ‘/page/5’ pattern:

add_action('template_redirect', function() {
    // Check if the current request matches the pattern '/page/*'
    if (preg_match('/\/page\/[\w\d]+/', $_SERVER['REQUEST_URI'])) {
        // Redirect to the homepage with a 301 permanent redirect header
        wp_redirect(home_url(), 301);
        exit();
    }
});

This will inform Google that this URL has been moved to another URL and should not be indexed. You can also submit the latest sitemap to the search console as well.

And there are a number of homepage/page5 redirects – page 11, etc will this address those too?

Yes, it will apply to any slug that has /page/* followed by any character or number after that. As for other redirects, it depends on where the redirection goes. If it goes to the homepage, you can use the same code with a slight modification to check the slug pattern.

..when I publish a post, the original slug is sometimes overwritten by the title..

I think this is the default behavior, as the slug will always be made up from the title when the permalink structure is set to post name or a custom structure.

Sorry about that. When did you send those replies? I didn’t see any reply notifications on this topic coming through our system. Could you resend them?

Try replacing the code I provided here:
https://generate.support/topic/unable-to-locate-strange-redirects/page/2/#post-107703

To this one:

add_action('template_redirect', function() {
    // Get the current URL path
    $current_url_path = trim(parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH), '/');
    
    // Check if the URL path matches the pattern 'page/*' and that it's at the root level
    if (!is_admin() && preg_match('/^page\/[\w\d]+$/', $current_url_path)) {
        wp_redirect(home_url('/'), 301);
        exit();
    }
});