If during the swipe back to turn the device, then a black area appearing, see the images. (https://i.stack.imgur.com/e8JcM.png) (https://i.stack.imgur.com/95bMG.png)
If in the project settings to enable "Require full screen", then this problem disappears, but I cannot enable "Require full screen" as I also need to use my application in "Split Mode". If someone faced this let me know how to fix it.