Hi @Seppo_Riiho, in Webflow the sticky position is always relative to the direct parent element, so it will be sticky for the length of the parent element.
Unlike in the example you provided, the sticky position Top is not reset to the current scroll position when the user immediately scrolls back up – so the user needs to scroll backup up the page to the defined sticky top position set in the designer before the element having sticky position will revert to relative position.
That example page you were referring to is using some sticky method, different than the way Webflow sticky position works.
You can probably achieve this, but it may require some custom code using some sticky plugin that will give more options than what is available natively in Webflow using data-attributes on different elements.
See this post, it might help to give you additional options: How to use Webflow & Sticky.js
I hope this helps