VGUI draws with a white flash over it

[LZ1WS]

For some reason when I draw my panel it is being rendered white over everything (like a foreground instead of a background), obstructing the text and a BG material:

function PANEL:Paint(w, h)
	surface.SetDrawColor(255, 255, 255, 255)
	surface.SetMaterial(matBG)
	surface.DrawTexturedRect(0, 0, w, h)
end