@GuyfromBOM
This is my guess about your situation (since I am also in the same boat)
It could be due to Address entered (by you) during recent fresh registration may not be "exactly" matching with your passport's.
I noticed while entering address, there was length restriction in text box (address line1 and 2). It was not allowing me to enter address as it is in my passport. I had to compromise on spelling (Block was changed to Blk)
They (AI's FF agency) being bots, could have naturally rejected it.
Stupid as it may seem, I have experienced same from Banks too (private banks who require KYC updates every 3 years).