SKLabelNode keeps jumping back and forth when displaying different numbers with equal number of digits

I'm trying to display a right-aligned timecode in my game. I had expected that digits would all have the same width, but this doesn't seem to be the case in SpriteKit, even though it seems to be the case in AppKit.

In SpriteKit, with the default font there is a noticeable difference in width between the digit 1 and the rest (1 is thinner), so whenever displaying a number with the least significant digit 1 all preceding digits shift slightly to the right. This happens even when setting a NSAttributedString with a font that has a fixedAdvance attribute.

class GameScene: SKScene {
    
    override func didMove(to view: SKView) {
        let label = SKLabelNode(text: "")
        view.scene!.addChild(label)
//        label.horizontalAlignmentMode = .left
        label.horizontalAlignmentMode = .right
        var i = 11
        Timer.scheduledTimer(withTimeInterval: 0.5, repeats: true) { _ in
            label.text = "\(i)"
//            let font = NSFont(descriptor: NSFontDescriptor(fontAttributes: [.name: "HelveticaNeue-UltraLight", .fixedAdvance: 20]), size: 30)!
//            let paragraphStyle = NSMutableParagraphStyle()
//            paragraphStyle.alignment = .right
//            label.attributedText = NSAttributedString(string: "\(i)", attributes: [.font: font, .foregroundColor: SKColor.labelColor, .paragraphStyle: paragraphStyle])
            i += 5
        }
    }
    
}

With AppKit, when using SpriteKit's default font HelveticaNeue-UltraLight, this issue doesn't exist, regardless whether I set the fixedAdvance font attribute.

class ViewController: NSViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        let font = NSFont(descriptor: NSFontDescriptor(fontAttributes: [.name: "HelveticaNeue-UltraLight"]), size: 30)!
//        let font = NSFont(descriptor: NSFontDescriptor(fontAttributes: [.name: "HelveticaNeue-Light", .fixedAdvance: 20]), size: 30)!
        let paragraphStyle = NSMutableParagraphStyle()
        paragraphStyle.alignment = .right
        let textField = NSTextField(labelWithString: "")
        textField.font = font
        textField.alignment = .right
//        textField.alignment = .left
        textField.frame = CGRect(x: 100, y: 100, width: 100, height: 100)
        view.addSubview(textField)
        var i = 11
        Timer.scheduledTimer(withTimeInterval: 0.5, repeats: true) { _ in
            textField.stringValue = "\(i)"
//            textField.attributedStringValue = NSAttributedString(string: "\(i)", attributes: [.font: font, .paragraphStyle: paragraphStyle])
            i += 5
        }
    }

}

Is there a solution to this problem?

I filed FB15553700.