rich, we have similar problem since we updated our game two days ago on 7th February. Full explanation in this forum, thread: https://forums.developer.apple.com/thread/96698
We did renew Paid Applications Contract recently, as there were some changes in iTunes and we had to mark one single check box of whether we are an individual person or an company. But we did that and got confirmation email that everything is in order. We also had to update our credit card information as the old card was no longer valid. But if neither of these would somehow be the source of the problem, then howcome some IAPs go through as normal sometimes, and one not at all...?