.tabBarMinimizeBehavior(.onScrollDown) not triggering in tabs that use NavigationStack(path:) (iOS 26 / Xcode 26 beta 7)

Environment

• iOS 26.0 (device), Xcode 26 beta 7
• SwiftUI TabView using the new Tab("…", value:) API
• iPhone only (aware that minimize is iPhone-only)

Issue

.tabBarMinimizeBehavior(.onScrollDown) only works reliably in my Settings tab. In my other tabs (Dashboard / Games / Help), the tab bar does not minimize when scrolling, even though the content is scrollable.

The main difference: those tabs are wrapped in a NavigationStack(path:) with a bound NavigationPath. Settings has no path binding.

Repro (minimal)

import SwiftUI

enum TabSel: Hashable { case dashboard, games, settings }

struct Root: View {
  @State private var selection: TabSel = .dashboard

  // Per-tab paths
  @State private var dashPath = NavigationPath()
  @State private var gamesPath = NavigationPath()

  var body: some View {
    if #available(iOS 26, *) {
      TabView(selection: $selection) {
        // ❌ Does NOT minimize when scrolling
        SwiftUI.Tab("Dashboard", systemImage: "square.grid.2x2.fill", value: .dashboard) {
          NavigationStack(path: $dashPath) {
            ScrollView {
// ...
            }
          }
        }

        // ❌ Same here
        SwiftUI.Tab("Games", systemImage: "sportscourt.fill", value: .games) {
          NavigationStack(path: $gamesPath) {
            ScrollView {
              // ...
            }
          }
        }

        // ✅ Minimizes as expected on scroll
        SwiftUI.Tab("Settings", systemImage: "gear", value: .settings) {
          // Note: also inside a NavigationStack, but no `path` binding
          NavigationStack {
            ScrollView {
       // ...
            }
          }
        }
      }
      .tabBarMinimizeBehavior(.onScrollDown)
    }
  }
}

What I tried

• Removing nested stacks in child views → no change
• Ensured no .tabViewStyle(.page) / PageTabViewStyle() anywhere
• No toolbar(.hidden, for: .tabBar) on the tab roots
• Confirmed the content is scrollable and tested on device

Expected

All tabs should minimize the tab bar on downward scroll.

Actual

Only the Settings tab (no path binding) minimizes; tabs with NavigationStack(path:) do not.

Questions

1. Is this a known issue with NavigationStack(path:) and .tabBarMinimizeBehavior in iOS 26 betas?
2. Any recommended workaround that keeps a bound NavigationPath per tab?