Script loaded even in taxonomy admin page

The drag&drop functionality is loaded even in a taxonomy admin page.

The url of the page in the menu is like:
https://DOMAIN/wp-admin/edit-tags.php?taxonomy=name_taxonomy&post_type=name_post_type

In the file include/class.cpto.php, row 269, the check is_tax() return false.

I solved by adding this lines on row 263:
if( isset( $screen->taxonomy ) && !empty($screen->taxonomy) )
return;

WP ver: 5.4.1
Plugin ver: 1.9.4.3