Hi folks!
We're hitting this kind of issue you can see on the video.
There is a header with a headline and if you are using Firefox (sometime in other browsers too) you can see there is no space at the first load. The space is showed after refresh.
Underlying page: https://www.datakhk.cz
From my point of view there is a bug in calculation of page-index element.
This is correct behaviour.
Thank you for your help.
Felix
