[NTG-context] beta/problem with layers

Hi, it seems there go something wrong with layers. \definelayer[test-layer][width=\paperwidth,height=\paperheight] \setlayer[test-layer][preset=middle]{why is this text not visible?} \setlayerframed [test-layer] % [preset=topright] [width=5cm,height=3cm,background=color,backgroundcolor=red] {why is this text not visible?} \defineoverlay[test-overlay][\framed{test-overlay}] \setupbackgrounds[page][background={test-layer,test-overlay}] \starttext \page[empty] \stoptext Greeting Andreas