AccessibilityService is started but does not receive AccessibilityEvents on JellyBean

I have a AccessibilityService that shall read out any incoming notification. It does work fine with ICS and below, but stopped working with JB.

Below are the Manifest and the code:

<service
        android:name=".Services.InstantMessengerJb"
        android:enabled="@bool/is_post_jb"
        android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE"
        tools:ignore="ExportedService" >
        <meta-data
            android:name="android.accessibilityservice"
            android:resource="@xml/accessibility_service_config" />

        <intent-filter>
            <action android:name="android.accessibilityservice.AccessibilityService" />
        </intent-filter>
    </service>

@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
    SettingsClass.logMe(tag, "New event!");
    new AccessibilityProcessing(this, event);
}

@Override
protected void onServiceConnected() {
    if (isInit) {
        return;
    }
    SettingsClass.logMe(tag, "We are connected!");
    AccessibilityServiceInfo info = new AccessibilityServiceInfo();
    info.eventTypes = AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED;
    info.feedbackType = AccessibilityServiceInfo.FEEDBACK_SPOKEN;
    setServiceInfo(info);
    isInit = true;
}

As said before it does work on all preJB-Devices like a charm, however on JB the service starts (I get the "We are connected"), but not a single event is fired.

Is there anything wrong with the code?