Playing on the new unofficial AU/NZ Server.
Upon spawning mid round could not see one team mate (three in total). To clarify, this was in normal mode and could not see said teammates icon. Player list showed player as dead (or not active in round). After I died could not spectate said player, his name was completely absent from team list for spectating.
Even after going through several rounds in that game, bug persisted. After that game finished I ended play for the night.
The closest I have seen to this bug on official servers is once last night on a EU server. Died and there was one teammate left. But could not spectate and his name did not appear in spectate list - he was fully visible during the round and before I died however.