I had the same thing happen with one of my cameras. It must have triggered 25 times in a row. I have it on power, not batteries. I did unplug the camera, and I deleted the camera and re-added it. It seemed to help.
But, I also note that the new XT2 cameras I just bought will trigger from sounds in the room, with no movement. Wonder if anyone else has seen this. I’m seeing clips with absolutely no movement in the room. And, these are cameras inside the house. So no wildlife or cars causing it.