If I recall, I believed this has happened other times (years back), and I "think" it had something to do with their printers who put the final product / Magazine together??? Don't quote me on that,,, but this has happened before.
I no longer have a dog in the fight (when it comes to being a subscriber) as there comes a point in one's life - where things like (Magazine Subscriptions) become repetitive material with different players (so to speak). However, (like back in the "old" days - if I saw a copy in the Magazine Rack - I'd latch onto it). I have no idea at all if they even go the "Magazine Rack" route anymore?
With this said, it's still one of the very best publications out there IMHO.