Group by Folders doesn't work as intended?

Hello, linux newbie here, Nobara KDE specifically. But i was wondering… is the “group by folders” toggle in the wallpaper slideshow broken maby? Or am I misinterpreting it’s meaning?
I use 2 monitors and have the “order” set to random with specific wallpapers sorted into folders, i.e. “aurora” “stars” “sunset” “foggy” ect.
The idea is to have a set of wallpapers randomly selected from the current “folder” and not from the others until it’s cycled and then switch to the next set, so that i have 2 different wallpapers on display but still with similar content for example: Two different pictures of the aurora and not one of the aurora and another of a sunset.
I have tried doing it through the wallpaper GUI and by adding the directories manually through editing the config file but neither seem to work and I can’t find proper online documentation or even imagery of the GUI with the option toggled on so this is kind of my last resort…
Hope someone can help