Sadly, it goes well beyond BIDV and Agribank as well. There is a lot of similar hacky fingerprinting done by all the Vietnamese banking apps.
My understanding is it's because there was some regulatory change in the last 1-2 years requiring identity fingerprinting using banking apps, and partially related with the new biometrics rollout [0]
[0] - https://xaydungchinhsach.chinhphu.vn/huong-dan-cai-dat-sinh-...
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