[Navigation] ViewModel is not cleared when the bottom sheet is closed with the hardware back button

[ghost]

Description ViewModel's onCleared() method is not called when the bottom sheet is closed with the hardware back button or with popBackStack(). If it's closed by tapping outside of the bottom sheet dialog onCleared() gets called.

Steps to reproduce

1. Open bottom sheet dialog
2. Press the hardware back button

Expected behavior ViewModel's onCleared() method is called

Additional context

    implementation "com.google.dagger:hilt-android:2.41"
    implementation "androidx.navigation:navigation-compose:2.5.0-alpha03"
    implementation "androidx.hilt:hilt-navigation-compose:1.0.0"
    implementation "com.google.accompanist:accompanist-navigation-material:0.24.4-alpha"
    kapt "com.google.dagger:hilt-compiler:2.41"
    kapt "androidx.hilt:hilt-compiler:1.0.0"

@AndroidEntryPoint
class MainActivity : ComponentActivity() {
    @OptIn(ExperimentalMaterialNavigationApi::class)
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            val bottomSheetNavigator = rememberBottomSheetNavigator()
            val navController = rememberNavController(bottomSheetNavigator)

            ModalBottomSheetLayout(
                bottomSheetNavigator = bottomSheetNavigator
            ) {
                BottomsheetTheme {
                    Box(modifier = Modifier.fillMaxSize()) {
                        NavHost(
                            navController = navController,
                            startDestination = "mainScreen"
                        ) {

                            composable(
                                route = "mainScreen",
                                content = {
                                    Button(onClick = { navController.navigate("bottomSheet") }) {
                                        Text(text = "open drawer")
                                    }
                                }
                            )

                            bottomSheet(
                                route = "bottomSheet",
                                content = {
                                    val vm: DrawerViewModel = hiltViewModel()
                                    Box(modifier = Modifier.fillMaxSize()) {
                                        Text(
                                            text = "bottomSheet"
                                        )
                                    }
                                }
                            )
                        }
                    }
                }
            }
        }
    }
}

@HiltViewModel
class DrawerViewModel @Inject constructor(): ViewModel() {

    override fun onCleared() {
        println("------- onCleared")
        super.onCleared()
    }
}

[FunkyMuse]

https://github.com/google/accompanist/issues/978

[jossiwolf]

Thanks @FunkyMuse. @david-gyavol, thank you for filing! Closing this in favor of #978.