Alright, maybe jumped the gun. Took the advice and tried to speak to an assessor, not sure if I did, but spoke to someone in the cards team who told me it was canned because there's a card showing as overdrawn, yet closed. Said it was a mastercard and I haven't had one of those with Westpac for probably a decade. So it's been kicked up the chain for further assessment.
However, I had this same card which I closed just over a year ago, which is why I was going back to the well. What's interesting is, this old overdrawn card didn't show up as an issue when I successfully applied in Nov 16.