widget not displaying correctly

Hi Ernest,

I have another issue I don’t know how to handle:
I use the widget search on every page inside the /zauberkunst/ category.
example: http://www.depasco.de/zauberkunst/zauberer-buchen/

You see that the search on the left side is empty.
The same happens to other pages inside this category, but not to all. I can’t find out what causes the widget not to display correctly sometimes.
I disabeled the caching plugin wp-rocket.
Perhaps you can take a look at the settings of the search plugin ?
Please ask if something is unclear…

Many thanks and best regards,

Markus