Weird animation when using AutoLayout

[ricardopereira]

If I use SpringIndicator with AutoLayout, the animation doesn't work correctly.

AutoLayout:

No AutoLayout:

Code:

class ViewController: UIViewController {

    lazy var springIndicatorView: SpringIndicator = {
        let indicator = SpringIndicator(frame: CGRect(x: 100, y: 100, width: 60, height: 60))
        indicator.translatesAutoresizingMaskIntoConstraints = false
        return indicator
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(springIndicatorView)
        springIndicatorView.rotationDuration = 2
        springIndicatorView.lineColor = .red
        springIndicatorView.lineWidth = 2
        NSLayoutConstraint.activate([
            springIndicatorView.topAnchor.constraint(equalTo: view.topAnchor, constant: 40),
            springIndicatorView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            springIndicatorView.heightAnchor.constraint(equalToConstant: 40),
            springIndicatorView.widthAnchor.constraint(equalToConstant: 40),
        ])
        springIndicatorView.start()
    }

}

Here is an example project:
SpringIndicatorBug.zip