So perhaps we don’t had the same View NX2, as I’ve used it a lot to put metadata in the Nef files, and I’ve never had any issue with DxO Optics Pro and PhotoLab, and I still not have any issue when I come back to one of these files.
I’m not using it only as it’s not working anymore on latest MacOS.
Yes, of course all what I was doing was loading images with Transfer NX which had metadata presets and then complete metadata and culling with View NX, and then open in Optics Pro / PhotoLab for the image development and optimization.
One thing more. Adding metadata to the file or renaming the file is not the same as editing. I use Viewnx2 too for adding metadata to the raw file. Also for camera’s that are not supported in the program.