Just happened to me on a 3 day old phone. A restart and it's gone. Uninstalled Google Camera which is the only third party cam app I've used. Any more issues and I'm returning the phone and possibly closing this new account. I have horrible service and they're playing stupid games with my account.
LG G3, GS5,
GS2, G Tab 3, G Tab 10.1, iPhone 5S, iPad Air, Kindle FireHD, Nexus One, Nexus 4, Nook, Palm Pre, Sensation