Issue with Blog post page resume / full-length

Hi everybody,
I tried to solve this by myself, but now I'm lost.

My last articles, in the default blog page, are showing in full-length. No idea why.
https://s3nzanom3.com/blog-s3nzanom3/

I check the last showing fine and the others: no differences in the settings.
Last showing correctly (at least to me):
"Il Masterplan dello scrittore nel 2020" (https://s3nzanom3.com/il-masterplan-dello-scrittore-nel-2020/)
First showing in full-length (and all the following the same):
"Da quale parte stai?" (https://s3nzanom3.com/da-quale-parte-stai/)

I did purge all the caches, mimic the settings, changed Wordpress AND/OR GP settings in all the possible setups.
Nothing. Those last articles stays always in full length.

Actually Wordpress is in "show resume" and the GP settings "Articles" is in "show resume". (Sorry, I see the settings in Italian, so maybe it isn't the exact writing).

Any idea? What am I missing?

Thank you very much in advance.