Excerpts not showing on all articles

Hi there,

Can you check to see if there is a space inserted in the custom excerpt metabox?
https://www.wpbeginner.com/plugins/add-excerpts-to-your-pages-in-wordpress/

Thanks for the reply:)

I am not using a custom excerpt, all my post has no expert entered here: https://prnt.sc/t57lw8

All the experts come by default from the first paragraph of the article.

Here is how my post looks in the editor: https://prnt.sc/t57mlu

& here is how my post looks on blog archive: https://prnt.sc/t57n47

Thanks!

Can you make sure there is no empty space added in the excerpt metabox?

We know the excerpt option is working as shown in other posts.

Something must be different about this post.

No empty space in meta box: https://prnt.sc/t57zh7

Is this message showing for all posts?
https://www.screencast.com/t/EueoDLWp

You really need to figure out what's the difference between this posts and all other posts that are working.

No, this message only shows on the post/page which is built with the classic editor not showing on Gutenberg editor.

I wonder if that's the issue. What happens if you click Keep as HTML button? Is the excerpt issue fixed?

Yes, it gets fixed by clicking the Keep as HTML and then update. But my issue is my clients have hundred of blog and I will have to do that manually in order to show the excerpts.

Unfortunately I'm not aware of a work around solution.

GP simply implements WordPress' default the_excerpt() funtion:
https://developer.wordpress.org/reference/functions/the_excerpt/