Nested NavigationSplitView has unexpected layout shift inside a TabView

I have initialized a new SwiftUI project for iOS. I wrapped the default NavigationSplitView from SwiftData inside a TabView and ran into the following issue: On an iPad (Air, 13 inch, iPadOs 26), the button to open/close the sidebar shifts downwards while opening or closing the sidebar. When the animation finishes, the button jumps back to the original position.

Here's the code I used inside my ContentView:

    var body: some View {
        TabView {
            Tab("Kategorien", systemImage: "circle.fill") {
                NavigationSplitView {
                    List {
                        ForEach(items) { item in
                            NavigationLink {
                                Text("Item at \(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard))")
                            } label: {
                                Text(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard))
                            }
                        }
                        .onDelete(perform: deleteItems)
                    }
                    .toolbar {
                        ToolbarItem(placement: .navigationBarTrailing) {
                            EditButton()
                        }
                        ToolbarItem {
                            Button(action: addItem) {
                                Label("Add Item", systemImage: "plus")
                            }
                        }
                    }
                } detail: {
                    Text("Select an item")
                }
            }
            
            Tab("Alle Bücher", systemImage: "circle.fill") {
                Text("Alle Bücher")
            }
        }
    }