As an example, I created the post “post test” (without any content)
When viewed on the page, that name appears twice, so it gives me duplicate content in Screaming Frog.
It is not enough to hide it, since Google detects it even if it is hidden. You have to eliminate it.
https://www.rincondesilencio.com/wp-content/uploads/2018/09/duplicado-título-del-post.jpg
https://www.rincondesilencio.com/wp-content/uploads/2018/09/prueba-post-screaming-frog.jpg
I hope that with this example it is clear what the problem is.