Color banding on files
In the last month I've started getting color banding on my .nef files. I shoot with Nikon - mostly a D500 with XQD card. However, I have got this problem with a D7200 using an SD card so it may not be the camera hardware.
About 5% of the images have banding.

Sometimes the banding does not appear right away. Sometimes when I go from Library to Develop, the banding shows up. Sometimes going from one view mode to another causes the banding to come or go.
I suspect the issue is either LR or my hard drive. I use an external 8TB western digital. I'm running an experiment with a catalog on my mac's SSD. Also, uninstalled LR and reinstalled.
Anyone seen this before?
