Id on <include> tag destroys layout

I have a layout in a separate xml file which gets included in other files. I want to reference the included file so I set an id. But with the id the layout gets completely unstructured. Mini example:

Parent-Layout:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <include layout="@layout/test_include" />

</android.support.constraint.ConstraintLayout>

Included layout:

<?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"
android:id="@+id/constraint_parent"
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:id="@+id/t1"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="1"
    app:layout_constraintEnd_toStartOf="@id/t2"
    app:layout_constraintStart_toStartOf="@id/constraint_parent" />

<TextView
    android:id="@+id/t2"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="2"
    app:layout_constraintEnd_toStartOf="@id/t3"
    app:layout_constraintStart_toEndOf="@id/t1" />

<TextView
    android:id="@+id/t3"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="3"
    app:layout_constraintStart_toEndOf="@id/t2"
    app:layout_constraintEnd_toEndOf="@id/constraint_parent"/>

The result is following layout:

But if I change the include tag to following:

<include
    android:id="@+id/test"
    layout="@layout/test_include" />

The result is:

So the layout gets lost completely. Is it not possible to add an id to an include tag? I want to add the include tag two times, thats why I want to add two different ids to the two include instead of referencing the parent layout of the included layout directly.

the problem in the included layout, please use this xml instead

<?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"
android:id="@+id/constraint_parent"
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:id="@+id/t1"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="1"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintEnd_toStartOf="@id/t2"
    app:layout_constraintStart_toStartOf="parent" />

 <TextView
    android:id="@+id/t2"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="2"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintEnd_toStartOf="@id/t3"
    app:layout_constraintStart_toEndOf="@id/t1" />

 <TextView
    android:id="@+id/t3"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="3"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintStart_toEndOf="@id/t2"
    app:layout_constraintEnd_toEndOf="parent"/>
 </android.support.constraint.ConstraintLayout>