MotionLayout Toolbar Menu Items disappear after MotionLayout.transitionToState()

[lnpg]

I try to add a menu to MotionLayout, following the youtube example This is the whole YoutubeDemoActivity file

class YouTubeDemoActivity : AppCompatActivity() {
    lateinit var motionLayout: MotionLayout
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.motion_24_youtube)
        motionLayout = findViewById<MotionLayout>(R.id.motionLayout).apply {
            savedInstanceState
        }
        findViewById<RecyclerView>(R.id.recyclerview_front).apply {
            adapter = FrontPhotosAdapter()
            isNestedScrollingEnabled = false
            layoutManager = LinearLayoutManager(this@YouTubeDemoActivity)
        }
        val debugMode = if (intent.getBooleanExtra("showPaths", false)) {
            MotionLayout.DEBUG_SHOW_PATH
        } else {
            MotionLayout.DEBUG_SHOW_NONE
        }
        motionLayout.setDebugMode(debugMode)
        setSupportActionBar(findViewById(R.id.toolbar))

    }

    override fun onResume() {
        super.onResume()

        motionLayout.transitionToState(R.id.end)

    }

    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
        menuInflater.inflate(R.menu.menu_test, menu)
        return super.onCreateOptionsMenu(menu)
    }
}

This is the beginning of layout file _motion_24youtube.xml

<androidx.constraintlayout.motion.widget.MotionLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/motionLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#444"
    app:layoutDescription="@xml/scene_24"
    tools:ignore="contentDescription"
    >

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        android:background="@color/colorPrimary"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

    </androidx.appcompat.widget.Toolbar>

Not much has changed, all I do is adding a menu, and calling motionLayout.transitionToState(R.id.end), menu item not showing up/disappear, especially after rotated to Landscape, this is also when ViewPager2 can't move in sync with collapsing AppBarLayout