Using layout_constraintDimensionRatio breaks the alignment

layout.xml

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/green">

        <ImageView
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:src="@drawable/photofullscreen_sample"

            app:layout_constrainedWidth="true"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintDimensionRatio="1200:900"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintWidth_max="120dp" />

    </android.support.constraint.ConstraintLayout>

with_1.1.0-beta6.png

with_1.1.0.png

See https://issuetracker.google.com/issues/79228893