I had one like this. I’d type the new password, confirm it, get “success!” And then type the exact same thing to log in and it would fail.

Turned out that the text box for entering the new password allowed a different number of characters than the one for logging in.

wha? Who does that? I don't think that's my problem, though i go crazy every time my password isn't recognized, i go through the process and this message comes up "you must use a different password". And i can't even just go back to the login menu. It's too late! And i paid money for this account.

I know a popular bank integral to the functioning and liquidity of an entire state whose "eBanking" features are like this, in 2021.