[NTG-context] layer disappears when showframe is set

Hi, this sample shows that the image in a layer in header disappears if showframe is set. \setupexternalfigures[location=default] \definelayer[Cow] [x=0, y=0] \setlayer[Cow] [x=10em, y=0mm] {\externalfigure[cow][height=\lineheight]} \setupbackgrounds[header][background=Cow] \showframe \starttext \input knuth \stoptext Mit freundlichen Grüßen Jan Ulrich Hasecke -- Autoren-Homepage: ......... http://literatur.hasecke.com Satiren & Essays: ......... http://www.sudelbuch.de Privater Blog: ............ http://www.hasecke.eu Netzliteratur-Projekt: .... http://www.generationenprojekt.de