Attribute "clearTaskOnLaunch" does not work

What I need basically is that when the user leaves the app for A or B reason to return to take me to the Login and not the screen where he stayed.

I put the attribute clearTaskOnLaunch in true then I understand that the behavior should be that being in the activity MainActivity , Main2Activity , Main3Activity if I go to the home or change the app when returning clean the backstack and it is called the activity TimeOut who is the one who has the attribute, but this behavior does not happen and always returns to activity where it stayed.

This is my manifest, I do not know if I should configue something else to make it work:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mikemir.sessiontimeout">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <service
            android:name=".Services.SessionService"
            android:enabled="true"
            android:exported="true" />

        <activity android:name=".TimeOut"
            android:clearTaskOnLaunch="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".MainActivity" />
        <activity android:name=".Main2Activity" />
        <activity android:name=".Main3Activity" />
    </application>

</manifest>