Diagonal patterns in zonation

Does anyone have an idea what could be causing these diagonal linear patterns? They aren’t following the flight path or planting path, or pre-season tillage paths. I can’t figure out if it’s an algorithm issue or something physical? Thanks.

I coudn’t upload all at once so here is another

Here is the flight plan for field 1

Did you use a radiometric calibration panel?

Thanks for your reply. I apologize for not seeing this sooner. Yes, this was flown using the calibration panel. It’s a strange phenomenon to be sure.