Fingerprint change itself all the time

Here I found some weired things. I bought a Windows Hello device recently and I found Bitwarden supports to using it to unlock, which is good, it works perfectly fine with the Bitwarden desktop APP. However, things goes a little bit tricky when it comes to the Chrome extension, I enabled ‘Unlock with biometrics’ option, and the desktop APP jumps out and told me I need to approve fingerprint or sort of things, I approve it without hesitate. Things suppose to end here, but what I found is that every single time I close my browser and try to unlock with the biometric things, it will generate a new fingerprint and ask me to approve, which is quite annoying.
So I am curious is this a common thing or if I done something wrong? Thank you.