alarm clock and audio ducking with voiceOver

Hello,
I have noticed that under iOS 10 with VoiceOver's audio ducking on, the alarm will start loud and voiceOver will say alarm as usual, but with the volume raised. Within seconds the alarm is so low yet the voice is loud when flicking right. How do I fix this? I have found the only way to work around this is with audio ducking off. Even then, the alarm will not be as loud as it should be. Either audio ducking off or VoiceOver off will provide a temporary fix. If I use alarm clock pro this does not happen, only with the provided clock app on iOS.
Thanks in advance.