It's happened twice to me. Motorola has admitted the camera app has a bunch of problems that they're working on.
Samsung Galaxy S4 - MDK bootloader / TWRP / MK2 modem / TW 4.4.2 NG2 ROM debloated
Samsung Gear Fit - NG2 ROM / NG2 Manager
Retired - iPhone, iPhone 3G, DX, DX2, D3, iPhone 4, Rezound, DNA, MOTOACTV
If you like what I've done, hit thanks or buy me a beer.