It might not be a security measure issue. Mine worked, then in 14.0.4 didn't work, not even after factory reset. Updates to 14.0.6, it's working again.I read many posts on xiaomi.eu.
Banking applications are also constantly being developed, so more advanced applications may be more sensitive.
Since I'm not a developer, I don't want to give silly advice.
As far as I know, there are several ways to avoid your problem.
Instead, ask the xiaomi.eu development team, maybe they can advise you.
@Igor Eisberg