Firebase click_action in notification payload work fine but it causes second time to launch same activity specified in click_action

Question

I was study about Firebase's click_action use to open activity on notification click when app was killed. It's work fine! But after closing app open app normally(Not from notification) but its open same activity as specified in click_action.

Here is the code in manifest for launch screen :

<activity
    android:name=".activity.SplashScreen"
    android:screenOrientation="portrait"
    android:theme="@style/LoginScreen">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
</activity>

And for Firebase notification :

<activity android:name=".activity.RequestsActivity">
        <intent-filter>
            <action android:name="RequestsActivity" />
            <category android:name="android.intent.category.DEFAULT"/>
        </intent-filter>
</activity>

Code for Application exit when get back to home screen then :

@Override
public void onBackPressed() {
    Intent intent = new Intent(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_HOME);
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(intent);
    finish();
    System.exit(0);
}

Flow of current screen

Notification->Click->RequestActivity->Back_Click->HomeScreen->BackClick->Exit_App->Reopen_App->RequestActivity(But it must be HomeScreen!).