I have as well a problem with the Aspect ratio and iPhone X. I have made a tutorial whereas elements from the UI and the Gamefield are in the exact same position. It works well on iPhone 5 and Tablet, but on iPhone X positions are not the same in UI and Gamefield. I use the AUTO option for screen adjustment. To understand well the problem, you can simply add a button to a UI, then add the same image as an object in the gamefield. Then play all 3 different devices in preview. It doesn't matter if stick to edge is ticked or not. Actually ticked it's even worse.