How did you spectate?
Spectate was added 4-5 weeks(or old) back.
Just in case someone wants to know.Usage :
/spec <ID/Name> = Start spectating the ID or the name of the player.
/exitspec = End Spectate mode.
Note : When the player dies spectate mode does not switch to other player with next ID instead it stays the exact place where that player died until he spawns again.To switch to other player you have to type /spec <ID/Name> again.Spectate mode is auto Ended when the player Disconnects.