I found a bug for both modes. If you hit 'finish drink' with only the wrong ingredients, and the glass is not completely filled; then the order vanishes without refreshing the cup. This prevents you from passing the order without completely filling the glass or redoing the order. On more complex orders it can prevent you from knowing the order, and having the accept the ruined order. (don't ask me how bad I am at this game that I found this. lol)
If anyone runs into this right now, the easy solution is to make sure your glass is full and then hit finish order again. It only doesn't let you complete the order if the drink isn't filled to a certain point, even if the ingredients are incorrect.