What I expected? Orbital lines to appear when I launch from the mun's surface.
What happened? They did not appear.
How to recreate: Create a lander with two stages, designed to leave the lower stage on the surface and take the upper stage back into orbit, just like the real Apollo missions. Stage the separator and engage the throttle and take it up to 25km. The orbital lines never re-appear on the map.
I think this bug is being caused by the system not recognising I took off, because there was a separator involved. Therefore it doesn't turn the orbital lines back on.