A sticky header (also known as persistent header) is the name for a common pattern that keeps a website's header in the same place on the screen as the user scrolls down the page.
To make the header non-sticky complete the following steps:
By disabling the system app "confluence-fixed-headers" the sticky header is globally disabled – there is no way to disable the sticky (Linchpin) header for specific spaces only.
For better comparision, you can see the difference between a sticky and a non-sticky header below.
Here the header stays at the top of the screen when the user scrolls down the page.
In this example the header does no longer stay at the top of the screen when the user scrolls down the page.
Link to this page: https://seibert.biz/theme-non-sticky-header