New Lobby - Start game with offline player

[Copac]

I feel like I'm missing something obvious, and I'm trying to give the new lobby screen a fair chance, but how do I create a game with offline players? The Start button only appears when they confirm, whereas using the old Play Now interface, I could still open the game but not start it until the offline players have confirmed. Unless I'm missing something, I have to use the new lobby to set the game options, add the player(s), then navigate away from the new lobby screen to my current tables list, click the table I just created, and then click the Open table to players button. Is there something on the new lobby screen I'm doing wrong? or am I supposed to stay on the new lobby screen until all of my players have confirmed?