UIAlertController is moved to buggy position at top of screen when it calls `presentViewController:`

Presenting a view from a `UIAlertController` moves the alert to a buggy position at the top-left corner of the screen. iOS 8.1, device and simulator. We have noticed this in an app when we attempt to present a view from the current "top-most" view. If a UIAlertController happens to be the top-most view we get this behavior. We have changed our code to simply ignore UIAlertControllers, but I'm posting this in case others hit the same issue (as I couldn't find anything). We have isolated this to a simple test project, full code at the bottom of this question. - Implement `viewDidAppear:` on the View Controller in a new Single View Xcode project. - Present a`UIAlertController` alert. - Alert controller immediately calls `presentViewController:animated:completion:` to display and then dismiss another view controller: The moment the `presentViewController:...` animation begins, the UIAlertController is moved to the top-left corner of the screen: When the `dismissViewControllerAnimated:` animation ends, the alert has been moved even further into the top-left margin of the screen: Full code: ``` - (void)viewDidAppear:(BOOL)animated { // Display a UIAlertController alert NSString *message = @"This UIAlertController will be moved to the top of the screen if it calls `presentViewController:`"; UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"UIAlertController iOS 8.1" message:message preferredStyle:UIAlertControllerStyleAlert]; [alert addAction:[UIAlertAction actionWithTitle:@"I think that's a Bug" style:UIAlertActionStyleCancel handler:nil]]; [self presentViewController:alert animated:YES completion:nil]; // The UIAlertController should Present and then Dismiss a view UIViewController *viewController = [[UIViewController alloc] init]; viewController.view.backgroundColor = self.view.tintColor; [alert presentViewController:viewController animated:YES completion:^{ dispatch_after(0, dispatch_get_main_queue(), ^{ [viewController dismissViewControllerAnimated:YES completion:nil]; }); }]; // RESULT: // UIAlertController has been moved to the top of the screen. // http://i.imgur.com/KtZobuK.png } ``` Is there anything in the above code that would be causing this issue? Do any alternatives exist that would allow bug-free presentation of a view from a UIAlertController? rdar://19037589 http://openradar.appspot.com/19037589