In a game (Jim Bryan's game, session code: SIBODOHA, session ID: 9890208, session version: 457, client version 464) I am playing online, on Round 9 the player who is playing with leader Jan Žižka submitted two cards to the event deck on one turn. The first was the card he intended to play, the other was automatically submitted. The second card was not even an event card, and has been submitted using Confucius' ability somehow.)
The player in question never had the Confucius leader in this game. Another player (me) is playing as Nostradamus, which might be a contributing factor to this bug.