This problem happens fairly frequently on the internet game.
You click a button and the program will ignore the click and the timer bar will start counting down and you will either get a check or fold upon time-up.....as if the program never register your button click.

On top of that, sometimes your game will be terminated by the server. You will get a message that you have been disconnected from the server.
I am using broadband high speed internet and other internet traffic/activities seems normal. So, it might be a problem with the server.