iPhone video feed orientation

Hi all,

Recently I have noticed that when I open a camera feed on my iPhone, and rotate my iPhone to landscape orientation, the video doesn’t automatically rotate any more. There is an icon in the bottom right corner of the screen to do it manually, but this is clunky. How can I change it back to auto rotate? I’m using version V6.0.00_260205232922 of the iOS iPhone app.

Thanks.