[NTG-context] Intersection of Header and Leftmargindistance

I have a background for my header that is supposed to extend over the entire width of the page (leftedge to rightedge). The background is interrupted in the area where the header intersects the space between text and left margin. There is no option to include leftmargindistance in \setupbackgrounds. Bug, workarounds? My code is below. There is no rightmargin, by the way. \setupbackgrounds[header][text,leftmargin,leftedge,rightedge] [background=color,backgroundcolor=horizstrip][state=repeat]