It’s a big problem here. If a player stops playing while their stones are still on the board, that completely changes the dynamic of the game. If they keep playing but their behaviour is ill-defined (i. e. they don’t have any real goal, but have to decide who to help just based on what they’re feeling), that also affects the game in a weird way. You can’t hope to do any “reading” if you don’t even know what game your opponent is playing.
It’s not a major issue for us in this first test game, we’re just trying things out and are all still beginners. But I think deciding how to handle this issue is quite important for future games!