No I'm pretty sure it doesn't. If you take a look at the report I generate below that we use for 'debugging' survey flights you'll notice that the sun was roughly just past north east, and by looking at the photo numbers you can see that the fixed wing drone flew roughly from east to west and then turned and flew west to east repeating this cycle twice for this field.
And so I think the banding effect you see is a side-effect of exposure differences etc. in flying towards and away from the sun.
In the yellow annotation blocks the first number is the photo number followed by the exposure number (EV) and then the CH0 count from the sunshine sensor (L). In this case for the NIR channel.
And here is a plot of the exposure values for each channel during the flight for this field.
And lastly a plot of the CH0 values from the sunshine sensor.
We use AgiSoft for the stitching. I don't have a license for Pix4D, hence the reason for me to perform the corrections etc. before feeding the images to AgiSoft.