iOS 18 - Toolbar keyboard placement within TabView, NavigationSplitView

Hello, After a fair amount of time of trial and error, I have seemingly discovered a bug in iOS 18 with .toolBar with placement:. keyboard)

Feedback: FB15205988 
Xcode Version: 16.0 (16A242d)
iOS Version: 18.0 (22A3351)

I'd appreciate help to see if I'm missing something here.

What's happening?

When using .toolBar with (placement: .keyboard), within a NavigationSplitView detail:, encompassed in a TabView, the .toolBar view does not appear above the keyboard.

Within the code, the usage of .toolBar is within ShakeDetail.swift.

When commenting out the TabView within ShakeTabView.swift, or running on iOS 17.5, the .toolbar appears.

Would greatly appreciate help if someone knows a workaround, or a misunderstanding here of course!

Code

Shake.swift

import Foundation
import SwiftUI

struct Shake: Equatable, Identifiable, Hashable {
    var name: String
    let id = UUID()
    
    static var example = Shake(name: "Banana")
    static var many: [Shake] {
            return [
                Shake(name: "Apple"),
                Shake(name: "Banana"),
                Shake(name: "Cherry"),
                Shake(name: "Berry"),
            ]
        }
}

ShakeDetail.swift

import SwiftUI

struct ShakeDetail: View {
    
    @State var shake: Shake = Shake(name: "")
    
    var body: some View {
        List {
            TextField("dsf", text: $shake.name, prompt: Text("Enter your favorite shake"))
        }
        .scrollDismissesKeyboard(.interactively)
        .toolbar {
            ToolbarItem(placement: .keyboard) {
                HStack(alignment: .center) {
                    Text(shake.name)
                        .font(.title3)
                        .foregroundColor(.red)
                }
            }
        }
        .toolbarColorScheme(.dark, for: .navigationBar)
        .toolbarBackground(
            Color.purple,
            for: .navigationBar
        )
        .toolbarBackground(.visible, for: .navigationBar)
    }
}

#Preview {
    ShakeDetail()
}

ShakeListView.swift

struct ShakeListView: View {
    @Binding var shakes: [Shake]
    @Binding var selectedShake: Shake?
    
    var body: some View {
        List(selection: $selectedShake) {
            ForEach(shakes) { shake in
                NavigationLink(value: shake) {
                    Text(shake.name)
                        .font(.system(.title2, design: .rounded))
                        .foregroundStyle(.primary)
                }
            }
        }
        .navigationTitle("Shakes")
    }
}

#Preview {
    @Previewable @State var shakes: [Shake] = Shake.many
    @Previewable @State var selectedShake: Shake?
    ZStack {
        ShakeListView(shakes: $shakes, selectedShake: $selectedShake)
    }
}

ShakeSplitView.swift

import SwiftUI
import OSLog


public struct ShakeSplitView: View {
    
    @State var selectedShake: Shake?
    @State var shakes = Shake.many
    
    @State private var columnVisibility = NavigationSplitViewVisibility.doubleColumn
    
    public init(isShowingFavorites: Bool = false, columnVisibility: SwiftUI.NavigationSplitViewVisibility = NavigationSplitViewVisibility.doubleColumn) {
        
        self.columnVisibility = columnVisibility
    }
    
    public var body: some View {
        NavigationSplitView(columnVisibility: $columnVisibility) {
                ShakeListView(shakes: $shakes, selectedShake: $selectedShake)
        } detail: {
            if let selectedShake {
                // Add shake detail
                ShakeDetail(shake: selectedShake)
            } else {
                Label("Please select a shake", systemImage: "arrow.backward.circle")
                    .foregroundColor(.purple)
                    .font(.system(.title2, design: .rounded))
            }
        }
        .navigationSplitViewStyle(.balanced)
    }
}

struct FormulaSplitView_Previews: PreviewProvider {
    static var previews: some View {
        ShakeSplitView()
    }
}

ShakeTabView.swift

import SwiftUI

struct ShakeTabView: View {
    var body: some View {
        /* TabView breaks the ToolbarItem(placement: .keyboard) */
        TabView {
            ShakeSplitView()
                .tabItem {
                    Image(systemName: "carrot.fill")
                    Text("Shakes")
                }
        }
    }
}

#Preview {
    ShakeTabView()
}