SwiftUI views don't get reused properly

[bryankeller]

When using SwiftUI views in an Epoxy Collection View, views are reused and onAppear is called for each one correctly most of the time, but not if you scroll up and down really fast (causing very fast cell reuse). See video:

Simulator.Screen.Recording.-.iPhone.14.Pro.-.2023-09-29.at.17.19.22.mp4

Repro case:

import Epoxy
import SwiftUI
import UIKit

final class SwiftUIInEpoxyViewController: CollectionViewController {

  init() {
    super.init(layout: UICollectionViewCompositionalLayout.listNoDividers)
    setItems(items, animated: false)
  }

  private var items: [ItemModeling] {
    (1...100).map { (index: Int) in
      SwiftUIView(value: index).itemModel(dataID: index)
    }
  }
}

private final class Store: ObservableObject {
  @Published var value: Int?
}

private struct SwiftUIView: View {

  let value: Int

  @StateObject private var store = Store()

  var body: some View {
    HStack {
      Text("\(value)")
      if let storeValue = store.value {
        Spacer()
        Text("\(storeValue)").foregroundColor(storeValue == value ? .black : .red)
      }
    }
    .padding(.horizontal)
    .onAppear {
      store.value = value
    }
  }

}