As you know, every layout element has a height by default. When we add the first element inside it, the height of the layout element will be based on the element inside it. It works well on pages, But this does not happen in the header and footer. Please watch the following video:
If I’m not mistaken, I already reported this and it was WIP. But I couldn’t find it before writing this thread. I hope I can find it so there aren’t two duplicate reports.