The game doesn't acknowledge that I have a Nintendo switch online membership. This makes it unable to have an online multiplayer game and split screen at the same time. I have Nintendo switch online but the game sometimes shows a little communication error when loading and when you click on it it just says that there is bad Internet even when it is connected and good. I think that this is what the problem comes from. There is good internet it works to do multiplayer without split screen but when you try to do both it doesn't work. I am not on the beta.