Other audio source disabled when I plug headphones on iOS

Hi,

When I have a stream video using EasyMovieTexture on iOS, the audio stream stops working when I plug headphones. This doesn't happen if I don't use photon voice.

I have an easy way for you to reproduce this issue:
1. Create a new unity project (I use the latest version)
2. Add Photon Voice
4. Add EasyMovieTexture.
5. Add a plane with a video somewhere in the scene. I'm using http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8
6. Run it on iOS.

Plugging and unplugging headphones mutes and unmutes the video stream.

Do you know why this is happening and how can I fix it?

Thank you