Controller gets poped when UIAlertController is used

[husyn]

I've used Slide-Menu in a ViewController and when I call [self presentViewController:alertController animated:YES completion:nil];

This is the error I got on the Debug area and my view controller is poped when the alert controller is dismissed.

popViewControllerAnimated: called on <SlideNavigationController 0x7fe0e186ea00> while an existing transition or presentation is occurring; the navigation stack will not be updated.

Please provide proper reasoning to why this is happening? Am I doing something wrong here?