SPOILER : This is just a bug report on a small bug. The bug itself can be bypassed by using windows parameters, but as it's still a bug, I guess it has to be pointed out.
On a 2 screen setup with Windows 10 on Extended Desktop mode. If you have a dualScreen dimension Wallpaper (of type 3640x1080) your fences may offset their background, resulting in a kind of bizarre effect where your fences background doesn't match with the actual background.
This is the reference background : (Sorry for the image, it's the background where I found the bug in the first place)
In your windows background parameters :
If you have your fit on "Fill", this happens:
"Adjust" does this :
You can fix this offset with the "Extend" fit option :