Announcements "Floating bar at the top of the page" sticky

[TSP]

Hello, 

In 4.5 if you create a announcement with the option "Floating bar at the top of the page" it no longer sticks to the top down the entire page. It only sticks inside the section with the header and navigation. 

In 4.4 it followed you down along the entire page, which is what I would expect to still be the case.