One M8 duo camera

[AC Question]

I notice the duo camera function is no longer working, at first I thought this was hardware related as I recently had the phone replaced, so I got another replacement phone and I was lucky enough to get a brand new phone, same problem. Not so bothered about the feature although it is annoying, but the black screen message telling me that the duo camera is blocked because I have the lenses covered is very annoying as it comes on every time I open the camera.