First of all, I am so happy to see the new version of Opera, but there is a bug I caught. One of the wallpapers I installed separately does not show the picture, but it shows a bunch of gray. There is also a weird fade effect. I uploaded an example video of this on YouTube but set it as "Unlisted" so only people with the link can view it.
Which wallpaper is it?
It is this one, but strangely, it would only not work for that one day.