i have a nestedscrollview, inside that a tablayout, each tab contains recyclerview, first tab recyclerview has lots of content and second tab recyclerview has less content. but second tab recyclerview taking same space like first recyclerview. second tab shows its content and a long black space like in first tab.

First time its working fine. but second time its not, may be the cache is cleared or not.

MainActivity

class MainActivity : AppCompatActivity() {

    lateinit var binding: ActivityMainBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        val fragmentContainer: FragmentContainerView = binding.fragmentContainerView

        val tabLayout = TabLayout(this)
        val viewPager = ViewPager2(this)

        val fragmentManager = supportFragmentManager
        val fragmentTransaction = fragmentManager.beginTransaction()

        fragmentTransaction.add(R.id.fragment_container_view, TabFragment())
        fragmentTransaction.commit()

    }

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<layout>
<androidx.core.widget.NestedScrollView
    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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <!-- Top TextView -->
        <TextView
            android:id="@+id/top_textview1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Top Text"
            android:textSize="18sp"
            android:layout_margin="16dp"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"/>

        <!-- Top TextView -->
        <TextView
            android:id="@+id/top_textview2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Top Text"
            android:textSize="18sp"
            android:layout_margin="16dp"
            app:layout_constraintTop_toBottomOf="@id/top_textview1"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"/>
        <!-- Top TextView -->
        <TextView
            android:id="@+id/top_textview3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Top Text"
            android:textSize="18sp"
            android:layout_margin="16dp"
            app:layout_constraintTop_toBottomOf="@id/top_textview2"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"/>

        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/fragment_container_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_constraintTop_toBottomOf="@id/top_textview3"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            />



    </androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
</layout>

TabFragment

class TabFragment : Fragment(R.layout.fragment_tab) {

    private lateinit var tabLayout: TabLayout
    private lateinit var viewPager: ViewPager2

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        tabLayout = view.findViewById(R.id.tab_layout)
        viewPager = view.findViewById(R.id.view_pager)

        val pagerAdapter = MyPagerAdapter(requireActivity())
        viewPager.adapter = pagerAdapter

        TabLayoutMediator(tabLayout, viewPager) { tab, position ->
            tab.text = "Tab ${position + 1}"
        }.attach()
    }
}

fragment_tab

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    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:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <!-- TabLayout for tabs -->
    <com.google.android.material.tabs.TabLayout
        android:id="@+id/tab_layout"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

    <!-- ViewPager2 for paging -->
    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/tab_layout"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

MyPagerAdapter

class MyPagerAdapter(activity: FragmentActivity) : FragmentStateAdapter(activity) {

    override fun getItemCount(): Int = 2

    override fun createFragment(position: Int): Fragment {
        return when (position) {
            0 -> Tab1Fragment()
            1 -> Tab2Fragment()
            else -> throw IllegalArgumentException("Invalid position")
        }
    }
}

fragment_recyclerview_tab1.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    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:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_view_tab1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_margin="16dp"/>

    <!-- Bottom TextView -->
    <TextView
        android:id="@+id/bottom_textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Bottom Text"
        android:layout_margin="16dp"
        android:layout_marginTop="16dp"
        app:layout_constraintTop_toBottomOf="@+id/recycler_view_tab1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

fragment_recyclerview_tab2.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    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:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_view_tab2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_margin="16dp"/>

    <TextView
        android:id="@+id/bottom_textview2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Bottom Text"
        android:layout_margin="16dp"
        android:layout_marginTop="16dp"
        app:layout_constraintTop_toBottomOf="@+id/recycler_view_tab2"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>


</androidx.constraintlayout.widget.ConstraintLayout>

item_recycler_view.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="200dp"
    app:cardElevation="4dp"
    app:cardCornerRadius="8dp"
    android:layout_margin="8dp">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/text_view_item"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"/>

    </androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>

I have tried with changing constraintlayout to coordinatorlayout because it may be an issue. for me , i think while changing fragments their state are not cleared.