CollapsingToolbar - перекрытие с правильной привязкой

Я пытаюсь создать CollapsingToolbarLayout, в котором есть плакат фильма, перекрывающий фон. Для этого я включаю behavior_overlapTop = "67dp", но это приводит к странному поведению при прокрутке.

При прокрутке мои взгляды отодвигаются от их перекрывающейся позиции. Как мне заставить их оставаться на месте?

<?xml version = "1.0" encoding = "utf-8"?>
<android.support.design.widget.CoordinatorLayout 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"
    android:fitsSystemWindows = "true"
    tools:context = ".MediaItemBaseActivity">

    <android.support.design.widget.AppBarLayout
        android:id = "@+id/app_bar"
        android:layout_width = "match_parent"
        android:layout_height = "250dp"
        android:theme = "@style/AppTheme.AppBarOverlay"
        app:elevation = "1dp">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id = "@+id/toolbar_layout"
            android:layout_width = "match_parent"
            android:layout_height = "match_parent"
            android:fitsSystemWindows = "true"
            app:contentScrim = "@color/colorPrimary"
            app:layout_scrollFlags = "scroll|exitUntilCollapsed"
            app:toolbarId = "@+id/toolbar"
            app:scrimAnimationDuration = "250"
            app:scrimVisibleHeightTrigger = "100dp">

            <ImageView
                android:id = "@+id/backdrop"
                android:layout_width = "match_parent"
                android:layout_height = "match_parent"
                android:fitsSystemWindows = "true"
                android:scaleType = "centerCrop"
                app:layout_collapseMode = "parallax"
                app:layout_collapseParallaxMultiplier = "0.7" />

            <android.support.v7.widget.Toolbar
                android:id = "@+id/toolbar"
                android:layout_width = "match_parent"
                android:layout_height = "?attr/actionBarSize"
                android:elevation = "20dp"
                app:layout_collapseMode = "pin"
                app:popupTheme = "@style/AppTheme.PopupOverlay" />

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

    <android.support.v4.widget.NestedScrollView
        android:layout_width = "match_parent"
        android:layout_height = "match_parent"
        app:behavior_overlapTop = "0dp"
        app:layout_behavior = "@string/appbar_scrolling_view_behavior"
        tools:context = ".MediaItemBaseActivity"
        tools:showIn = "@layout/activity_media_item_base">

        <android.support.constraint.ConstraintLayout
            android:id = "@+id/ll_content"
            android:layout_width = "match_parent"
            android:layout_height = "wrap_content"
            android:orientation = "vertical"
            android:paddingEnd = "16dp"
            android:paddingStart = "16dp">

            <ImageView
                android:id = "@+id/poster"
                android:layout_width = "134dp"
                android:layout_height = "201dp"
                android:layout_gravity = "top|start"
                android:layout_marginTop = "-10dp"
                android:elevation = "10dp"
                app:layout_anchor = "@id/ll_content"
                app:layout_constraintStart_toStartOf = "parent"
                app:layout_constraintTop_toTopOf = "parent" />

            <TextView
                android:id = "@+id/surtitle"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:layout_marginBottom = "4dp"
                android:textAllCaps = "false"
                android:textSize = "14sp"
                app:layout_constraintBottom_toTopOf = "@+id/title"
                app:layout_constraintStart_toStartOf = "@+id/title" />

            <TextView
                android:id = "@+id/title"
                android:layout_width = "0dp"
                android:layout_height = "wrap_content"
                android:layout_marginStart = "16dp"
                android:layout_marginTop = "96dp"
                android:ellipsize = "end"
                android:maxEms = "9"
                android:maxLines = "3"
                android:singleLine = "false"
                android:textAllCaps = "false"
                android:textColor = "@android:color/black"
                android:textSize = "20sp"
                android:textStyle = "bold"
                app:layout_constraintEnd_toEndOf = "parent"
                app:layout_constraintStart_toEndOf = "@+id/poster"
                app:layout_constraintTop_toTopOf = "parent" />

            <TextView
                android:id = "@+id/subtitle"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:layout_marginTop = "4dp"
                android:textAllCaps = "false"
                android:textSize = "14sp"
                app:layout_constraintStart_toStartOf = "@+id/surtitle"
                app:layout_constraintTop_toBottomOf = "@+id/title" />

            <TextView
                android:id = "@+id/body"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:layout_margin = "@dimen/text_margin"
                android:layout_marginTop = "8dp"
                app:layout_constraintEnd_toEndOf = "parent"
                app:layout_constraintStart_toStartOf = "parent"
                app:layout_constraintTop_toBottomOf = "@+id/poster" />

            <TextView
                android:id = "@+id/credit_title_1"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:layout_marginTop = "8dp"
                android:textStyle = "bold"
                app:layout_constraintStart_toStartOf = "parent"
                app:layout_constraintTop_toBottomOf = "@id/body" />

            <TextView
                android:id = "@+id/credit_name_1"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:layout_marginStart = "8dp"
                app:layout_constraintStart_toEndOf = "@id/credit_title_1"
                app:layout_constraintTop_toTopOf = "@id/credit_title_1" />

            <TextView
                android:id = "@+id/credit_title_2"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:textStyle = "bold"
                app:layout_constraintStart_toStartOf = "parent"
                app:layout_constraintTop_toBottomOf = "@id/credit_name_1" />

            <TextView
                android:id = "@+id/credit_name_2"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                app:layout_constraintStart_toStartOf = "@+id/credit_name_1"
                app:layout_constraintTop_toTopOf = "@id/credit_title_2" />

            <TextView
                android:id = "@+id/credit_title_3"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:textStyle = "bold"
                app:layout_constraintStart_toStartOf = "parent"
                app:layout_constraintTop_toBottomOf = "@id/credit_name_2" />

            <TextView
                android:id = "@+id/credit_name_3"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                app:layout_constraintStart_toStartOf = "@+id/credit_name_2"
                app:layout_constraintTop_toTopOf = "@id/credit_title_3" />

        </android.support.constraint.ConstraintLayout>

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

    <android.support.design.widget.FloatingActionButton
        android:id = "@+id/fab"
        android:layout_width = "wrap_content"
        android:layout_height = "wrap_content"
        android:layout_margin = "@dimen/fab_margin"
        app:layout_anchor = "@id/app_bar"
        app:layout_anchorGravity = "bottom|end"
        app:srcCompat = "@drawable/ic_add_black_24dp" />

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