I have an iPad Pro running iPadOS version 13.2.3. I get Notifications that pop up on my screen but only last a few seconds. Sometimes I can swipe down from the top of the screen (I use my iPad at home in landscape orientation) and the Notification will pull down but moves back up after I let it go. This method of pulling down the notification only works occasionally. Why is that? Why can't I always pull down a previous notification? It sometimes takes 10 attempts to pull it down and other times I give up before ever getting it down again.