The one with me happened last Thursday I think. I assumed it was due to me lagging out and the server still thinking I was in game as I couldn't log back on for several minutes. Which happens when the lag is as bad as it was, FL locked up so I had to cancel FL.exe in task manager, and as I was lagging when I did that the server still thought I was logged in.
I couldn't figure out what he was carrying on about until he started shooting it and my shield started going down. I logged out again and it fixed that but he could still see the ship until he relogged.
Sorry for not posting it but given it was lag related I didn't think it was a problem with the server so much as my lousy connection. Lag's been known to do some really strange things so when lag's involved I generally don't bother posting it as a bug.