Custom Taxonomy

Hi
I create a custom taxonomy for “Posts”, and when I put that in the shortcode, the slider just ignore the parameter and show all posts.

My custom taxonomy unique name is: categoria_tecnico

I’m using shortcode:
[recent_post_slider taxonomy=”categoria_tecnico” post_type=”post”]

But it’s not filtering, plugin keep showing all the posts.

Anyone knows how can I filter custom taxonomy?