Hook not working on one page

Hi,
I have a strange problem. I have defined a hook to resize a widget

ul.rag-widget li {
width: 33% !important;
min-width: unset !important;
max-width: unset !important;
}

and it works on all posts/pages defined in the display rules but one seems not to work.

It is the widget under the title "Landmarks ...", on the English page the widget is not resized, on the page in German it is displayed correct.