Badge is not always showing

[hannesoud]

I have a 3 UIView controller and they are called in sequence in navigation stack.
VC1->VC2->VC3

VC2 has UIBarButtonItem and it shows number of cart items in viewWillAppear() and it doesn't show when pushed from VC1, but shows when popping from VC3.

Here is code

@IBOutlet weak var cartItem: UIBarButtonItem!

override func viewWillAppear(_ animated: Bool) {
        if count == 0 {
            self.cartItem.clearBadge()
        } else {
            self.cartItem.badgeBgColor = UIColor(hex:"71c386")
            self.cartItem.badgeCenterOffset = CGPoint(x:-16, y:0)
            self.cartItem.badgeFont = UIFont.boldSystemFont(ofSize: 12)
            self.cartItem.showBadge(with: .number, value: count, animationType: .none)
        }
}

I am using Xcode 8.3.2 and testing on iOS 10.3.1 iPhone 6 plus.