Tab based application in iPhone X

I have a tabbed based iOS application. I am using the Safe Area Layout Guide introduced in iOS 11. Because it is a tab based app, the initial view controller in the StoryBoard is a Tab Bar View Controller. In interface builder, the hierarchy is as follows:

-Tab Bar View Controller

--Tab Bar

---Safe Area


I do not use a custom tab bar and I do not change its appearance at all (aside from hiding it in certain views). However, launching the iPhone X Simulator, the app is automatically centered on the display, with the top and bottom simply shown as black. I thought this was supposed to be resolved by using SAL? How can I move the tab bar down?

Do you have a launch storyboard?

Tab based application in iPhone X
 
 
Q