iPad 4th gen (MD520LL/A) with iOS 10.3.3
As the title says, the screen sticks when scrolling to the notifications page. I've removed all notification panels on the screen so all that is left is the edit button and the wallpaper, but it still stick for about 7-10 seconds anytime you access that page. Scrolling through the app pages is quick and snappy.
Soft and hard reboots have not changed this behavior.