Popup asking to Update Existing credentials

Can you please look into this as it is quite annoying.

- I Login using saved 1Password credentials
-1Password POPup says create "New Login/Update Existing"
-If I select "Update Existing" - I subsequently cannot login with these credentials updated by 1Password again.

TEST: Select "New Login".... have a look at what 1Password saves and it saves NEW random Data for the fields

This is a pain as some websites use more fields than username/password... and these other fields do not have a save history like password does.

is this Apple's latest save and generate password APIs passing obfuscated data that 1Password is recognizing as new data?

or is 1Password generating new data to be saved???

Using current Firefox with 1Password Extension

Website for reference is [banking]: https://www.stgeorge.com.au/
Web Fields used are:

<input type="text" name="userId" size="19" maxlength="19" value="" id="access-number" tabindex="1" aria-label="Enter your Card or Access Number" oninput="handleCardNumberInput()">

<input type="password" name="securityNumber" size="6" maxlength="6" id="securityNumber" pattern="[0-9]*" tabindex="2" aria-label="Enter your Security number">

<input type="password" name="password" size="12" maxlength="12" id="internet-password" class="internet-password" tabindex="3" aria-label="Enter your Internet Banking Password">

Thanks