‘Insert after paragraph number’ works only for some posts

Is this via the block editor. And is there a different way that that the two posts are created?

I’m wondering if it is because of the number p tags which are created in both cases as that is used to “search” for the exact paragraph to insert it before/after.

I don’t know, sorry. I use Gutenberg’s block system of WordPress and the format is the same for all the posts. This is the question.

I need to do testing. I think it’s the way Gutenberg creates the markup of posts – where only paragraphs have the markup. I need to figure out a different way to do it if the block editor is enabled.

I sometime noticed also that the related posts appear if I copy the text without editing. Like they are hidden into the text and appears only at the end of the post.

Can you do a test on this post?

https://www.lucascialo.it/sommergibile-titan-come-funziona-prezzo/

Copy the text without edit format and you’ll read “

“Leggi anche:

Caso Baldwin: perché sui set italiani non accade

Caso Baldwin: perché sui set italiani non accade

Covid, OMS dichiara fine Pandemia: dubbi sui 20 milioni di morti

Covid, OMS dichiara fine Pandemia: dubbi sui 20 milioni di…”

They are the related post hidden into the text.