My Profoto C1 Plus or C1 flashes more than once per image captured. Why?

When shooting with Auto exposure, Profoto Camera analyses one or more pre-flashes from the Profoto C1 Plus or C1 in order to determine the exposure for a correctly exposed subject. If you prefer a faster workflow, you can capture the first image with Auto exposure and then switch to Manual exposure. You then keep the exposure and flash power from the image captured with Auto exposure, and the C1 Plus or C1 will only flash once per image. With Manual exposure, you can also finetune the exposure or flash power if needed.