Not sure if this is a known bug or not but when i placed a plexbeacon onto my ship the light was not only displayed where it should be but also behind it. Here is a pic of what it looks like:
http://i1300.photobucket.com/albums/ag99/thrkrew01/starmadeglitch_zpsf2537b3e.png
http://i1300.photobucket.com/albums/ag99/thrkrew01/starmadeglitch_zpsf2537b3e.png