Full Screen Notification only showing as a Heads Up

Question

I have been banging my head against the table with this problem for 3 days now, please tell me where I have strayed.

When I am getting an incoming VoIP call, I am try

Answer 1

Figured it out! It was something stupid just as I suspected.

In my IncomingCallActivity I had the following bit of code

public void onPause() {
    super.onPause();
    finish();
}

It turns out that something having to do with how Notifications get shown actually calls onPause, therefore finishing the activity.

Thanks to @JohanShogun for attempting to help out.