title: Navigation slow after changing semanticContentAttribute
body: <p>To change LTR to RTL I am using one storyboard with autolayout constraints leading and trailing. On the button click of change language to Arabic/English. I am calling switchLanguage(). Which changes the LTR to RTL and vice versa. All layout seems to be good. </p>
  
  <p>The issue is after changing semanticContentAttribute from .forceLeftToRight to .forceRightToLeft or vice versa multiple times. The app navigations seems to be very slow and I have noticed the CPU usage reaches to 99%. The more you switch language the more is slower.</p>
  
  <pre><code>func swichLanguage {
      if Lang.current = .ar {
          UIView.appearance().semanticContentAttribute = .forceRightToLeft
      } else {
          UIView.appearance().semanticContentAttribute = .forceLeftToRight
      }
  
      let sb = UIStoryboard.init(name: "Main", bundle: nil)
      let vc = sb.instantiateInitialViewController()
      let appDelegate = UIApplication.shared.delegate as! AppDelegate
      appDelegate.window?.rootViewController = vc
  }
  </code></pre>