ConstraintLayout-beta5 bug

test_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:background="#f2f2f2"
    android:layout_height="wrap_content">

    <!-- notice margin top + bottom here -->
    <ImageView
        android:id="@+id/imageView"
        android:layout_marginTop="24dp"
        android:layout_marginBottom="24dp"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="8dp"
        android:src="@android:color/darker_gray"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:text="TextView1"
        app:layout_constraintBottom_toTopOf="@id/textView2"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/imageView"
        app:layout_constraintTop_toTopOf="@+id/imageView"
        app:layout_constraintVertical_chainStyle="packed"
        />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:text="TextView2"
        app:layout_constraintBottom_toBottomOf="@+id/imageView"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/imageView"
        app:layout_constraintTop_toBottomOf="@+id/textView1" />

</android.support.constraint.ConstraintLayout>

This layout rendered with constraint-layout-1.1.0-beta4

This layout rendered with constraint-layout-1.1.0-beta5