The posts in question are not published, in part due to this problem.
The posts are under the category of Flavours, some are okay as I rebuilt them but there are many more.
Thanks for your attention.
So on that page you linked above, all of GP’s elements are removed because you are using Elementor for everything including the header, menu and footer.
If that’s the case, you are better off inserting the page title using Elementor as well.