Why is part of my UIView covering the keyboard?

Part of my UIView is covering the iPad's keyboard.

The view you're seeing is simply a UIView I've added as a subview to my main view. When the keyboard is shown, I do shift the view up.

Has anyone ever seen this before?

EDIT

When the keyboard is shown, I move the view up:

[UIView animateWithDuration:SHOW_KEYBOARD_ANIMATION_DURATION animations:^{
    CGRect frame = self.currentViewController.view.frame;
    frame.origin.y -= SHOW_KEYBOARD_OFFSET;

    self.currentViewController.view.frame = frame;
}];

EDIT

I use the follow code to add the view:

[UIView transitionFromView:fromView toView:toView duration:0.3f options:UIViewAnimationOptionTransitionCrossDissolve completion:nil];