Sketch fails to display properly when creating a new part in an assembly

Often, when I create a new part directly in an assembly whenI create my first sketch on a plane in the assy the sketchlines/arcs or whatever do not display on the screen. But when yousave the sketch and reopen it or rebuild it the sketch reappears.Its a little glitch I have noticed for a while and wondering ifanyone else has this happen.SolidworksAssemblies