IOS - NavigationBar in UIPageViewController overlaps status bar

My app is built with iOS8 and the deployment target is iOS7.

I have a UIPageViewController as my root controller. The first page is a normal view controller without a navigation controller. The second page is a table view controller that has a navigation controller. when scrolling to the second page, the navigation bar overlaps the status bar. After scrolling, the navigation bar will lower a little and return to normal.

This only happens on iPhone6p. Other devices are correct.
Does anyone have the same problem?