stripes on imported pictures

Hi, I recently changed from a Nikon D5600 to a Nikon D500, and since I have issues importing Photos to Lightroom. The pictures are getting stripes (not all of them and varying size and position), which isn't very pleasant... However, when I import the images directly on my PC, I don't have such an issue (the NEF files are fine, and Windows Photos shows intact previews. It would be great to know if someone experienced similar problems and a solution exists!