Background Notification sound when connected to headset

I have the latest version of XiiaLive Pro installed on Android 4.4.2 (Sprint Galaxy S3). The notification (like an email) volume plays well along with XiiaLive where both can be heard simultaneously and I have the Ignore audio focus option enabled. However when the device is connected to a headset, XiiaLive sound gets paused and the notification sound plays and then XiiaLive sound resumes. Is there any way to play both at the same time (with lower volume) in the background when connected to a headset also?