Bug line on wallpaper in desktop mode on right and bottom

[make-your-soft-better]

Desktop settings -> Wallpaper Mode -> Stretch to the full screen and crop.

A strange line appears on the right.
Sometimes it doesn't appears, especially if switch the wallpaper mode several times.
Appears on resolutions: 1600x900, 1366x768.
It is especially annoying when the wallpaper is dark and the line is white.

It looks like an error when taking pixels from image, going out of bounds or something like, idk.

[ib]

All necessary information is missing:

• What size and format is the wallpaper?
  (Is there a sample available for download that shows the bug on 1366x768?)
• What distribution and version of pcmanfm are you using?

[make-your-soft-better]

Distribution on both devices: Artix Linux (OpenRC)
GPU on device 1: Nvidia RTX 4060
GPU on device 2: Not, IntelHD on CPU
pcmanfm version on both devices: "pcmanfm 1.3.2-1 (lxde)". Not "lxde-gtk3" or "lxqt"
Buggy images formats: jpeg and png

Files: buggy_wallpapers.tar.gz

The wallpapers I use are usually at a very high resolution, exceeding the size of my screens.
But I also tried to compress the Windows XP wallpaper image to a very small size, and the problem is also observed.
I think, wallpapers with an odd number of pixels in width are not buggy, but buggy with an even number of pixels in width.
I have not yet been able to create lines on the right in pictures with an odd number of pixels in width.

I also noticed when switching from bright purple wallpaper to dark, that the line on the right is bright purple.

UPD: I made the panel (lxpanel) transparent, and now I see, that there is also a bug line at the bottom

[ib]

Have you really ever noticed this with png files?

The files are bilinearly interpolated and the artifacts you observe are very likely a result of the jpeg format.

I saved the wallpapers in png format and there were no longer any bug lines.

[make-your-soft-better]

Maybe you're right. Maybe the .png wallpapers that I have have some problems.
But I don't think most people will store a large number of very high resolution wallpapers in .png format.