My Newsstand magazine subscription is not showing the newest issue as available for download. I have turned off background refresh, signed out and in, restarted the machine, and uninstalled and reinstalled the app. I have called the publisher and confirmed the issue has been published. I do nont have any other digital subscriptions so cannot compare whether this is the only magazie (Artforum) that I am having problems with. I've had his problem in previous months, but cannot remember how the problem was corrected (probably some combination of the above attempts at solution).