redirect only on submit - not an update

Hi,

You can check the post ID in the URL if the users edit the post from the frontend dashboard. Here is the example code

add_filter( 'rwmb_frontend_redirect', function( $redirect, $config ) {
    // Get the post ID from the URL if the user edit the post from frontend dashboard
    $value = $_GET['rwmb_frontend_field_post_id'];
    if ( empty( $value ) ) {
        $redirect = 'https://yourdomain.com/custom-page/';
    }
    return $redirect;
}, 10, 2 );