カスタムビューで draw(_ rect:) をオーバーライドして CGContext 経由で描画しようとしてるんですが、ビューの高さを増やすと描画されなくなる現象にハマってます。何かわかる方いますか？↓の height を増やすと描画されなくなります。

import UIKit // `drawRect` fails when `height` is increased private let height: CGFloat = 2000 class ViewController: UIViewController { @IBOutlet private var scrollView: UIScrollView! private var heightConstraint: NSLayoutConstraint! override func viewDidLoad() { super.viewDidLoad() let drawRectView: DrawRectView = DrawRectView() drawRectView.translatesAutoresizingMaskIntoConstraints = false scrollView.addSubview(drawRectView) heightConstraint = drawRectView.heightAnchor.constraint(equalToConstant: height) NSLayoutConstraint.activate([ drawRectView.topAnchor.constraint(equalTo: scrollView.topAnchor), drawRectView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor), drawRectView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor), drawRectView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor), drawRectView.widthAnchor.constraint(equalTo: scrollView.widthAnchor), heightConstraint, ]) } @IBAction func pressButton(_ sender: UIButton) { // this does not make `drawRect` fail heightConstraint.constant += 1000 } } class DrawRectView: UIView { override func draw(_ rect: CGRect) { let context: CGContext = UIGraphicsGetCurrentContext()! print("\(#file) \(#line): frame=\(frame)") context.setLineWidth(6.0) context.setStrokeColor(UIColor.red.cgColor) context.move(to: .zero) context.addLine(to: CGPoint(x: frame.size.width, y: frame.size.height)) context.strokePath() } }