Black screen comes up when scanning credit card
I have an iPhone 6 and whenever I go to pay with a credit card and use the 'scan credit card' feature on Safari, a black screen comes up. It is a black screen with the white outline of a credit card and states 'position card in this frame', but everything else is black. The camera is not covered or anything and I've done a hard restart. It's been going on for a couple of months now.
I used to be able to use the feature (it is awesome!) but I think I selected a privacy setting that disabled it or it could be a software glitch.
Thank you for any help!
iPhone 6, iOS 8.1.3, Verizon 16 GB