Hi. I am have issues with my Zebra Gk420d printer printing my labels consistently. What's happening is it will seem to be printing fine for a period of time and then it will decide to stop printing. The printing Que shows that it is printed and therefore is empty. It's like something is causing it to get hung up between the communication from the computer to the printer. Has anyone had an issue you like this before? I am running out of ideas!