Same issue here with released macOS 15.0, Xcode 16.0 (16A242d) and iPhone 16 Pro. Filed a feedback FB15201194

The issue seems to be fixed in iOS 18 beta 5

same issue here, I filed a feedback FB14697845

FYI I am also able to reproduce the issue with latest iOS 18 beta 4.

I have found a workaround using NavigationPath instead of an array of Route in my NavigationModel class NavigationModel: ObservableObject { static let shared = NavigationModel() @Published var selectedTab: String @Published var homePath: NavigationPath @Published var testPath: NavigationPath } Edit: It fixes the "push twice" issue but NavigationStack still acts weirdly, even though the path is correct, some views are not correctly popped. Removing the TabView still fixes all issues so I think the TabView is buggy.