Camera problem with iPhone 6: it can take videos but not photos, and flashlight doesn't work either.

Hi everybody,

I've recently discovered a camera problem with my new iPhone 6 (iOS 8.3). It doesn't seem to be a hardware issue, as the camera app can take videos or panorama photos, but suddenly it stopped taking normal photos (with any combo of HDR and flash), plus the flashlight doesn't work at all. I've tried resetting to factory settings and rebooting but no luck unfortunately... Sometimes it seems to wake up and work fine for a while, but most of the time there is this bug...

I would appreciate any help on this matter. Cheers