Is someone hacking my camera?

[AC Question]

Is someone hacking my camera? I was on snapchat in the discover section looking at the daily mail and on one of the pictures the was a flashing/glitching square box that shows what the front camera is seeing. Is this just snapchat stuffing up or should I be worried?

 

[DLK1]

And was this front camera seeing you? If so I would be concerned.