- I got a game invite for a costum game and accepted it.
- It took me to the welcoming screen but did not enter the game, so I went to costums and tried to join manually.
- The game was full so I clicked on spectate.
- Entered champ selection, and the timer started counting the delay.
- Before the loading screen I got an error message saying "You cannot join game XXXX because you are already in game XXXX [XXXX]".
- I tried to spectate another game and got the same error.
- Restarting the client seems to fix it.
I already spectated a game earlier with no problems, though I quit before the game ended.