It looks like the select field, not select_advanced (default). Please deactivate all plugins except Meta Box, MB extensions and switch to the default theme of WordPress Twenty Twenty to check the issue again. If it does not solve, I recommend checking your code, it might use the field type select.
You can also get connections with posts that have other statuses (draft, pending, private...) by using the setting query_args.
The code would be:
'from' => 'CPT',
'to' => array(
'post_type' => 'CPT',
'field' => array(
'field_type' => 'select' //Check the field type here
'query_args' => array(
'post_status' => array( 'pending', 'draft', 'private' )