Yes, or you can fail certification over something as insignificant as using the term "menu" instead of "options", and other shit like that. From what I talked with people yesterday, apparently the 21 days sounds to people in gamedev as exactly that - a failed patch certification. Because that's the minimum amount of time between submitting again + getting to hear back about it or something along these lines, anyway.
If it's that, then it'd make sense with how sudden it was and nobody, even within the company and especially the social media people, knew until the official announcement.