When navigationTransition returns through the return gesture, the original view disappears。 The same problem occurs when using the official example。
https://developer.apple.com/documentation/swiftui/enhancing-your-app-content-with-tab-navigation
xcode Version 16.4 (16F6)
macOS 15.5
ios26
I encountered the same issue on iOS 26.
Same issue iOS 26. I've found that returning quickly causes the source view to not leave the hidden state (it is invisible but still tappable). If I let the full animation finish, it returns normally without the bug.