[Plugin: WP Use parent template] Problem with get_post_meta() and WP use parent template plugin

Hi,

I use this plugin and i can’t get data from the get_post_meta() function.

Works fine on:
https://www.xxxxx.com/category/test/

But not on:
https://www.xxxxx.com/category/test/test-sub/

Any ide on how to fix this?

https://www.ads-software.com/extend/plugins/wp-use-parent-template/