Unable to sign in to a Google account using a saved passkey

So, this is roughly what I have done.

Using Firefox with BETA extension, I logged into my Google account, using password/OTP. It then gave me the option to add passkey.

As long as I don't delete history, Google will allow me to use passkey to login. If I go to private window or remove firefox history, the only option my google account has, is to login with password. (This includes picking other methods). It treats it as if the account has no passkey, not even giving the option of the QR code using another device.

If you login, you can confirm that there is a passkey on the account, but you can no longer use it as an option.

If you now add a second passkey, and sign out, you can once again sign in using a passkey.

The secondary issue at the moment is that, if you have multiple google accounts, it will always use the top passkey entry, so if you have a@gmail.com and b@gmail.com, if you attempt to login using a or b, it will always use a's passkey.

This seems to only affect google, though I need to do further testing, but many of the other entries on passkeys.directory don't have this issue.

I will try adding 1password to edge and doing some testing as well.

EDIT: Can confirm that EDGE only gives password as login option, so I have to assume Edge has some identifier that's being synced between the 2 instances?