Pushing a new List from a NavigationLink within a List freezes the simulator/canvas (SwiftUI) - swift

Question

When building a List View that can push a secondary List of items, the XCode simulator and SwiftUI canvas freezes without throwing an error. The code below describes the view hierarchy I am using to recreate this issue:
class Listable: Identifiable {
var id: UUID = UUID()
var name: String = "Name"
var title: String = "Title"
var description: String = "This is a description"
}
struct ContentView: View {
var items: [Listable]
var body: some View {
NavigationView {
List(items) { item in
ListCell(item: item)
}
.navigationBarTitle(self.items[0].title)
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView(items: testList)
}
}
struct SecondaryListView: View {
var items: [Listable]
var body: some View {
List(items) { item in
ListCell(item: item)
}
.navigationBarTitle(self.items[0].title)
}
}
struct ListCell: View {
var item: Listable
var body: some View {
NavigationLink(destination: SecondaryListView(items: testSecondaryList)) {
Image(systemName: "photo")
VStack(alignment: .leading) {
Text(item.name)
.font(.title)
.fontWeight(.light)
Text(item.description)
}
}
}
}
let testList = [
Listable(),
Listable(),
Listable()
]
let testSecondaryList = [
Listable(),
Listable(),
Listable(),
Listable(),
Listable(),
Listable()
]
Note: If I replace the List object within SecondaryListView with a ForEach (as seen below), the code compiles and runs with no issue, and I can navigate as far down the stack as I'd like.
struct SecondaryListView: View {
var items: [Listable]
var body: some View {
ForEach(items) { item in
ListCell(item: item)
}
.navigationBarTitle(self.items[0].title)
}
}
Is pushing a List View from within a List View not allowed or is this a bug? It appears to cause a memory leak possibly - CPU on my main thread hits 99%.

Answer 1

The root cause ended up being that I was modifying the UITableView.appearance().backgroundView in the SceneDelegate. See below code:
SceneDelegate.swift:
UITableView.appearance().backgroundView = UIImageView(image: UIImage(named:"Background"), highlightedImage: nil)
My goal was to have a background image across all UITableViews within the app (Lists in SwiftUI still leverage UIKit components). The workaround I settled on was instead setting a background color with a UIColor init'd with a pattern image, as shown below:
UITableView.appearance().backgroundColor = UIColor(patternImage: UIImage(named:"Background") ?? UIImage())