Whenever I take a photo of a light source with the back camera of my 6s, there is an annoying oval shape. This happens during the "preview" before actually taking the photo too. This only happens when the light source is actually in frame, and the shape moves accordingly (pictures attached). I was wondering if this was normal, and if anyone else has had this issue? Cleaning the outside glass has no effect. I have a Genius bar appointment booked for later, but my warranty expired just over a month ago... However as I'm in the UK would this be covered by the EU consumer laws?