When playing Lockdown, I was waiting for my GvG LD match to start. Just before I was to be teleported into the waiting room, I went into the list of available spectatable matches, saw my own match listed, and spectated that. Thus, I ended up spectating my own GvG match. Usually, the system teleports you from your spectation to the LD waiting room, so I don't know why it didn't happen this time.

Also, after the my GvG match, I exited from spectation, and I then attempted to rejoin my guildmates. However, the Coliseum tab stated that I was still waiting for GvG, but I was not in my guild's LD waiting list. I could not join my guild's LD waiting list because I was already registered in GvG LD with the Coliseum. Withdrawing from the GvG waiting was futile as the game stated that there was a problem with the server, so it was not possible. So, I had to X-out and restart SK.

In short, spectating your own match at the moment that you are teleported into that match creates problems.