Why does the same shadow setting produce inconsistent results?

[Oneechan69]

The apps are Neovide, Dolphin, & Zen Browser, on NixOS.

decoration {
	# https://wiki.hyprland.org/Configuring/Variables/#decoration
	rounding = 10
	shadow {
		enabled = true
		range = 100
		render_power = 3
		color = rgba(000000FF)
		offset = 0, 10
		# ignore_window = true
		scale = 0.95
	}
	blur {
		xray = true
		enabled = true
		size = 50
		passes = 1
		vibrancy = 0.1696
	}
}

[Oneechan69]

This seems to be a bug show I made this post: #11050