pagination config file ignored after upgrade

Everything was working fine in version 3.0.0

However, after upgrading to version 3.1.0, my pagination config file is totally ignored.

I have this in my Controller:

PHP Code:

$config['base_url'] = '/controller/function/' . $type . '/';
$config['uri_segment'] = 4;
 
$this->load->library('pagination');
$this->pagination->initialize($config); 
$data['pagination'] = $this->pagination->create_links(); 


And I have additional settings stored here:

application/config/pagination.php

The above was working fine in CI 3.0.0.  After I upgraded to 3.1.0, my pagination markup reverted to default because all custom configuration settings contained within my pagination.php file are being ignored.

What's going on?  Thanks.