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 / NC5 modem / TW 4.4.2 debloated
Samsung Gear Fit - stock
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.