Jetpack Compose release version: 1.0.0-alpha08 Android Studio Build: Android Studio Arctic Fox | 2020.3.1 Canary 2

BottomBar no longer updates Scaffold's contentPadding whenever bottomBar changes "visibility".

Here is the sample code to reproduce:

@ExperimentalAnimationApi
@Composable
fun FillingIssues() {
    val navController = rememberNavController()

    Scaffold(
        bottomBar = {
            val currentBackStack by navController.currentBackStackEntryAsState()
            val route = currentBackStack?.arguments?.getString(KEY_ROUTE)
            AnimatedVisibility(
                visible = route == SECOND_SCREEN,
                exit = slideOutVertically(
                    targetOffsetY = { it },
                ),
                enter = slideInVertically(
                    initialOffsetY = { it },
                ),
            ) {
                Surface(
                    modifier = Modifier.fillMaxWidth()
                        .wrapContentHeight()
                        .shadow(8.dp, clip = false),
                    elevation = 8.dp,
                    color = MaterialTheme.colors.surface,
                ) {
                    Text(
                        modifier = Modifier.fillMaxWidth(),
                        text = "Bottom Bar",
                        textAlign = TextAlign.Center,
                    )
                }
            }
        }
    ) { padding ->
        val modifier = Modifier.padding(padding)
        NavHost(navController, startDestination = FIRST_SCREEN) {
            composable(FIRST_SCREEN) {
                MyScreen(modifier, Color.Blue) {
                    navController.navigate(SECOND_SCREEN)
                }
            }
            composable(SECOND_SCREEN) {
                MyScreen(modifier, Color.Red) {
                    navController.navigate(FIRST_SCREEN)
                }
            }
        }
    }

}

@Composable
fun MyScreen(
    modifier: Modifier,
    color: Color,
    onClick: () -> Unit,
) {
    Column(
        modifier.fillMaxSize(),
        Arrangement.Center,
        Alignment.CenterHorizontally
    ) {
        Box(modifier = Modifier.weight(1f).background(color))
        Button(onClick = onClick) {
            Text("Proceed")
        }
    }
}



private const val FIRST_SCREEN = "FIRST_SCREEN"
private const val SECOND_SCREEN = "SECOND_SCREEN"