I just noticed this earlier, there is a game here which has been frozen for over two hours. Spectating, you see the both of them just sitting there, and I've checked in a few times. When you first enter, the end turn bar runs down, and then nothing else happens at all. No matter how long you watch, nothing happens whatsoever. It is probably a form of the frozen game bug, I just don't feel like anyone would stay in the game like this for this long, and when people leave frozen games, the game has disappeared in all other cases. Here are my screenshots:
Spectating:
Game name: