Some images have vertical lines in their thumbnails

[seabirdr]

Vertical lines appear mostly in the white areas of the image

screenshot_20201116_161239.jpg

A picture of the problem is attached below

Empty State on boarding mobile safety app coins fail wrong failure mon.zip

--

I’m sorry I found out I sent my post to the wrong section. I tried to edit it, but I found that I couldn’t change the board, so I’m going to leave it here for the administrator to do what he wants with it.

[xnview]

Strange, i can't reproduce. Even if you use 'View>Rebuild thumbnails'

[Rick]

I am not getting that either. It seems to be interpreting the gradient background with the vertical bars. It may have to do with color depth or a host of other things
See what it does with the attached gradient