nicepage wp online: doesn't show all my images in a specific page

In the web mariafedericaselvi.com there are several pages created with nicepage in wp. In the last page created "E POI", when I try to change a picture with nicepage, the new window MY PICTURES only shows the few pictures loaded in that page and not the full content of the media library as usual. the extrange thing is when I edit a different page in the same web, It shows all the pictures loaded in the wp media library as usual.
The only thing, I guess, could have cause this error is that I have updated the template but I didn't loaded the content because I only wanted to make some corrections in the blog template.
Thank you