swiftui - SwiftUI 也会导致死循环，为什么呢？

Question

这是我的初始代码

import SwiftUI

struct Question01: View {
    
    @State private var height: CGFloat = 0
    
    var body: some View {
        ScrollView(Axis.Set.vertical, showsIndicators: false) {
            LazyVStack
            {
                ForEach(0..<100) { _ in
                    GridentLabel(fontSize: 14, fontColor: UIColor.red, transfromColor: UIColor.black, content: "ttttttttttttttttttttbbbbbbbbbbbbbbbbbtttttttttttttttttttttttttt", transfromContent: "bbbbbbbbbbbbbbbbb", labelHeight: $height)
                        .frame(height: height)
                }
            }
        }
    }
}

struct Question01_Previews: PreviewProvider {
    static var previews: some View {
        Question01()
    }
}



struct GridentLabel: UIViewRepresentable {
    
    let fontSize: CGFloat
    let fontColor: UIColor
    let transfromColor: UIColor
    let content: String
    let transfromContent: String
    @Binding var labelHeight: CGFloat
    
    func makeUIView(context: Context) -> UILabel {
        let label = UILabel(frame: .zero)
        label.numberOfLines = 0
        label.lineBreakMode = .byWordWrapping
        label.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
        return label
    }
    
    func updateUIView(_ uiView: UILabel, context: Context) {
        if content.isEmpty == false {
            let paragraph = NSMutableParagraphStyle()
            paragraph.lineSpacing = 5.0
            paragraph.lineBreakMode = NSLineBreakMode.byCharWrapping
            let attrString = NSMutableAttributedString(string: content, attributes: [.paragraphStyle : paragraph, .font: UIFont.systemFont(ofSize: fontSize, weight: .regular), .foregroundColor: fontColor])
            let range: NSRange = (content as NSString).range(of: transfromContent)
            attrString.addAttribute(NSAttributedString.Key.foregroundColor, value: transfromColor, range: range)
            uiView.attributedText = attrString
            DispatchQueue.main.async {
                labelHeight = uiView.sizeThatFits(CGSize(width: uiView.bounds.width, height: CGFloat.greatestFiniteMagnitude)).height
            }
        }
    }
}

为什么使用 LazyVstack 集合框架会导致死循环？我仍然无法理解这样的问题。如果直接使用Vstack，不会出现死循环。为什么，或者如果你不设置框架，它不会导致无限循环。虽然不设置框架不会对程序产生任何影响，但为什么会这样呢？