Problem with child theme text domain

I use Genesis theme with child themes. In previous versions of the Loco Translate plugin everything worked fine, however I have just setup a new site and now for my child theme it shows the same textdomain as parent theme ‘genesis’. In my child theme functions.php I have correctly setup load_child_theme_textdomain. When I start translating the child theme, it shows parent theme source strings. What could be the problem?