fitsSystemWindows is not working with DialogFragment

Question

I m trying to create simple FullScreen Dialog with DialogFragment but UI is conflicting with Statusbar

This issue is raised when calling it from the fragment (TabLayout's Fragment) If I'm calling it from the activity it's working fine.

How can I fix it any help...

I m using this code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="match_parent"
   android:background="@android:color/white"
   android:fitsSystemWindows="true"
   android:orientation="vertical">

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal">

        <ImageButton
            android:id="@+id/button_close"
            android:layout_width="?attr/actionBarSize"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/selectableItemBackgroundBorderless"
            android:tint="@android:color/white"
            app:srcCompat="@drawable/ic_birthday_cross" />

        <TextView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center_vertical"
            android:text="Dialog title"
            android:textAppearance="@style/Base.TextAppearance.AppCompat.Title"
            android:textColor="@android:color/white" />

        <Button
            android:id="@+id/button_action"
            style="@style/Widget.AppCompat.Button.Borderless"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center"
            android:paddingLeft="2dp"
            android:paddingRight="2dp"
            android:text="Action"
            android:textColor="@android:color/white" />

    </LinearLayout>

</android.support.design.widget.AppBarLayout>

<android.support.v4.widget.NestedScrollView
    android:id="@+id/nested_scroll_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scrollbars="none"
    android:scrollingCache="true">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal|center_vertical"
        android:text="Full Screen Dialog" />

</android.support.v4.widget.NestedScrollView>

This dialog fragment calling from Tablayout's fragment

FragmentManager fragmentManager =  getFragmentManager(); //getSupportFragmentManager();
        BirthdayDialogFragment newFragment = new BirthdayDialogFragment();
        FragmentTransaction transaction = null;
        if (fragmentManager != null) {
            transaction = fragmentManager.beginTransaction();
        }
        assert transaction != null;
        transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
        transaction.add(android.R.id.content, newFragment).addToBackStack(null).commit();