Before_header hook changes layout in secondary languages

Hello,
I can't figure out why I have different featured image width and different spacings between the images in different languages of the same page.

It is most evident on these pages:

https://www.tourist-in-rom.com/en/new-homepage-en/ (defective layout) and
https://www.tourist-in-rom.com/de/neue-homepage/ (correct layout)

but I have the same problem also on other pages like
https://www.tourist-in-rom.com/it/roma-informazione-turistica-trasporto/ (correct) and
https://www.tourist-in-rom.com/en/rome-travel-guide/ (wrong).

To reduce the spaces, I used the following css:

.page-hero {
margin-top: -33px;
}

The image resolution is the same for all pages.
Any idea how to solve this?