Kiosk mode on Android, not allowing Google Voice to ring

Kiosk mode on Android, not allowing Google Voice to ring

I'm trying to restrict an android phone to use Google Voice in kiosk mode.  I can do that but when I call the GVoice number the phone doesn't ring, it just shows the accept/decline call screen with not audible notifications.  If I exit kiosk mode it rings every time.  I've searched all of the support area and all of the kiosk settings but can't find a solution.
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