Inconsistent State Restoration of ViewModel in Android 14 with Navigation Component
I've been banging my head against this for hours. Hey everyone, I'm running into an issue that's driving me crazy... I've searched everywhere and can't find a clear answer. I'm experiencing an scenario where the state of my ViewModel is not being consistently restored when navigating back to a Fragment using the Navigation Component in Android 14. I have a ViewModel that holds some user input data, and I'm using the `SavedStateHandle` to retain this data across configuration changes. The question arises specifically when I navigate back to the Fragment after having navigated away, such as to a Detail screen. I expect the previous user inputs to be retained, but instead, the ViewModel shows null values for the fields that should have been saved. I’ve tried using `onSaveInstanceState` to save the state, but it seems to conflict with how the Navigation Component handles state restoration. Here's a simplified version of my ViewModel: ```kotlin class MyViewModel(private val savedStateHandle: SavedStateHandle) : ViewModel() { var userInput: String? get() = savedStateHandle.get<String>("user_input") set(value) { savedStateHandle.set("user_input", value) } } ``` In my Fragment, I am observing changes like this: ```kotlin viewModel.userInput?.let { input -> editText.setText(input) } ``` I also have the following code in my Fragment to save the state: ```kotlin override fun onPause() { super.onPause() viewModel.userInput = editText.text.toString() } ``` However, when I navigate back, the values are reset. I've checked the logs and there aren’t any relevant behavior messages. I’m also using the latest version of the Navigation and lifecycle libraries. Could anyone shed light on why my ViewModel's state isn't persisting as expected? Are there any known issues with state restoration in Android 14 that I should be aware of, or am I possibly misusing the `SavedStateHandle`? Any insights or workarounds would be greatly appreciated! For context: I'm using Kotlin on macOS. Any ideas what could be causing this? The project is a mobile app built with Kotlin. Thanks for your help in advance!