Hide UIActionSheet animated when option was selected

Hi,

Anyone who has an idea why my ActionSheet animation is broken after I clicked an option and move back and try again?

This is the click handler for the actionsheet:

// ActionSheet button clicked handler
void actionSheetClickedHandler (object sender, UIButtonEventArgs e)
{
    // If the button that was clicked was a "real" option
    if (e.ButtonIndex != -1 && e.ButtonIndex != 3) {
        String signButtonPressed = ConfigurationService.AVAILABLE_SIGN_OPTIONS [e.ButtonIndex];

        if (_availableSignResourcesTVC == null)
            _availableSignResourcesTVC = new AvailableSignResourcesTableViewController ();

        _availableSignResourcesTVC.SetCertificateCategoryByIdentifier (signButtonPressed);

        this.NavigationController.PushViewController (_availableSignResourcesTVC, true);
    }
}

I've recorded the issue and you can view it here.

Kind regards,
Wouter