What is the reason for the loss of focus in TextField when new views are included around it?

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The reason for the loss of focus in TextField when new views are included around it is because the TextField is no longer the active view in the application's view hierarchy. When a new view is added, it becomes the active view and the focus is taken away from the previous view. This is a common behavior in iOS applications and is intended to provide a clear and unobstructed view of the current screen. To maintain focus on a specific TextField, it can be useful to use techniques such as resigning the keyboard or navigating to the next TextField as appropriate.