diff --git a/app-android/src/main/java/io/github/droidkaigi/confsched/KaigiApp.kt b/app-android/src/main/java/io/github/droidkaigi/confsched/KaigiApp.kt
index 2e32ebe23..1af5e33d5 100644
--- a/app-android/src/main/java/io/github/droidkaigi/confsched/KaigiApp.kt
+++ b/app-android/src/main/java/io/github/droidkaigi/confsched/KaigiApp.kt
@@ -133,6 +133,7 @@ private fun KaigiNavHost(
     displayFeatures: PersistentList<DisplayFeature>,
     modifier: Modifier = Modifier,
     navController: NavHostController = rememberNavController(),
+    mainNestedNavController: NavHostController = rememberNavController(),
     externalNavController: ExternalNavController = rememberExternalNavController(),
 ) {
     SharedTransitionLayout(modifier = modifier) {
@@ -144,9 +145,10 @@ private fun KaigiNavHost(
                 startDestination = mainScreenRoute,
             ) {
                 mainScreen(
-                    windowSize,
-                    navController,
-                    externalNavController,
+                    windowSize = windowSize,
+                    navController = navController,
+                    mainNestedNavController = mainNestedNavController,
+                    externalNavController = externalNavController,
                 )
                 sessionScreens(
                     onNavigationIconClick = navController::popBackStack,
@@ -197,12 +199,14 @@ private fun KaigiNavHost(
 private fun NavGraphBuilder.mainScreen(
     windowSize: WindowSizeClass,
     navController: NavHostController,
+    mainNestedNavController: NavHostController,
     @Suppress("UnusedParameter")
     externalNavController: ExternalNavController,
 ) {
     mainScreen(
         windowSize = windowSize,
         mainNestedGraphStateHolder = KaigiAppMainNestedGraphStateHolder(),
+        mainNestedNavController = mainNestedNavController,
         mainNestedGraph = { mainNestedNavController, contentPadding ->
             nestedSessionScreens(
                 modifier = Modifier,
diff --git a/app-ios-shared/src/commonMain/kotlin/io/github/droidkaigi/confsched/shared/IosComposeKaigiApp.kt b/app-ios-shared/src/commonMain/kotlin/io/github/droidkaigi/confsched/shared/IosComposeKaigiApp.kt
index 7fcbe7e53..f4eab5d9a 100644
--- a/app-ios-shared/src/commonMain/kotlin/io/github/droidkaigi/confsched/shared/IosComposeKaigiApp.kt
+++ b/app-ios-shared/src/commonMain/kotlin/io/github/droidkaigi/confsched/shared/IosComposeKaigiApp.kt
@@ -197,11 +197,13 @@ private fun KaigiNavHost(
     onLicenseScreenRequest: () -> Unit,
     onAccessCalendarIsDenied: () -> Unit,
     navController: NavHostController = rememberNavController(),
+    mainNestedNavController: NavHostController = rememberNavController(),
 ) {
     NavHostWithSharedAxisX(navController = navController, startDestination = mainScreenRoute) {
         mainScreen(
             windowSize = windowSize,
             navController = navController,
+            mainNestedNavController = mainNestedNavController,
             externalNavController = externalNavController,
             onLicenseScreenRequest = onLicenseScreenRequest,
         )
@@ -257,12 +259,14 @@ private fun KaigiNavHost(
 private fun NavGraphBuilder.mainScreen(
     windowSize: WindowSizeClass,
     navController: NavHostController,
+    mainNestedNavController: NavHostController,
     externalNavController: ExternalNavController,
     onLicenseScreenRequest: () -> Unit,
 ) {
     mainScreen(
         windowSize = windowSize,
         mainNestedGraphStateHolder = KaigiAppMainNestedGraphStateHolder(),
+        mainNestedNavController = mainNestedNavController,
         mainNestedGraph = { mainNestedNavController, contentPadding ->
             nestedSessionScreens(
                 modifier = Modifier,
diff --git a/feature/main/src/commonMain/kotlin/io/github/droidkaigi/confsched/main/MainScreen.kt b/feature/main/src/commonMain/kotlin/io/github/droidkaigi/confsched/main/MainScreen.kt
index ac34ea6fb..2ff1cf812 100644
--- a/feature/main/src/commonMain/kotlin/io/github/droidkaigi/confsched/main/MainScreen.kt
+++ b/feature/main/src/commonMain/kotlin/io/github/droidkaigi/confsched/main/MainScreen.kt
@@ -30,10 +30,10 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavController
 import androidx.navigation.NavGraphBuilder
+import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.currentBackStackEntryAsState
-import androidx.navigation.compose.rememberNavController
 import conference_app_2024.core.designsystem.generated.resources.ic_fav_off
 import conference_app_2024.core.designsystem.generated.resources.ic_fav_on
 import conference_app_2024.core.designsystem.generated.resources.ic_info_off
@@ -73,6 +73,7 @@ const val mainScreenRoute = "main"
 fun NavGraphBuilder.mainScreen(
     windowSize: WindowSizeClass,
     mainNestedGraphStateHolder: MainNestedGraphStateHolder,
+    mainNestedNavController: NavHostController,
     mainNestedGraph: NavGraphBuilder.(mainNestedNavController: NavController, PaddingValues) -> Unit,
 ) {
     composable(mainScreenRoute) {
@@ -82,6 +83,7 @@ fun NavGraphBuilder.mainScreen(
             MainScreen(
                 windowSize = windowSize,
                 mainNestedGraphStateHolder = mainNestedGraphStateHolder,
+                mainNestedNavController = mainNestedNavController,
                 mainNestedNavGraph = mainNestedGraph,
             )
         }
@@ -108,6 +110,7 @@ enum class NavigationType {
 fun MainScreen(
     windowSize: WindowSizeClass,
     mainNestedGraphStateHolder: MainNestedGraphStateHolder,
+    mainNestedNavController: NavHostController,
     mainNestedNavGraph: NavGraphBuilder.(NavController, PaddingValues) -> Unit,
     eventFlow: EventFlow<MainScreenEvent> = rememberEventFlow(),
     uiState: MainScreenUiState = mainScreenPresenter(eventFlow),
@@ -139,6 +142,7 @@ fun MainScreen(
             navigationType = navigationType,
             routeToTab = mainNestedGraphStateHolder::routeToTab,
             onTabSelected = mainNestedGraphStateHolder::onTabSelected,
+            mainNestedNavController = mainNestedNavController,
             mainNestedNavGraph = mainNestedNavGraph,
         )
     }
@@ -201,11 +205,10 @@ fun MainScreen(
     navigationType: NavigationType,
     routeToTab: String.() -> MainScreenTab?,
     onTabSelected: (NavController, MainScreenTab) -> Unit,
+    mainNestedNavController: NavHostController,
     mainNestedNavGraph: NavGraphBuilder.(NavController, PaddingValues) -> Unit,
     modifier: Modifier = Modifier,
 ) {
-    val mainNestedNavController = rememberNavController()
-
     val navBackStackEntryRoute =
         mainNestedNavController.currentBackStackEntryAsState().value?.destination?.route