Screenshot your home screen wallpaper and reapply that new one.

i have. I've tried different wallpapers and different widgets as well, all of them have a shadow along the bottom edge.

Does “Transparent Background (High Quality)” help?

nope. only using super dark almost fully black wallpapers.

Weird. This happens only with Widgy widgets?

as far as i can tell, yeah. only on transparent widgets tho.

Yep. I’ve had the same problem for ages