Hello; No, I did not apply for Queensland, but my wife's Korean police certificate was faulty. However, the ensuing process was the same: rejection.
As mentioned above, I did the whole process again from scratch, i.e. got the new police certificate within a few days, applied, into Express Entry pool, got drawn after a few weeks, handed in application, handed in further documents, and … received the final request to hand in my passport for the issuance of my COPR a week ago! So all my other documents were fine, just the police certificate not.
However, still double-check all your other docs too, can't hurt. Keep us updated, would be interesting to know if indeed CIC finds other "elements which may also be missing or incomplete" besides the police certificate after you handed in the correct one. Good luck!
I just read this thread from the start, and nice to know it had a happy ending. Congratulations and good luck.