On the Bank of America website, using the Safari extension, the Bank of America password is filled in on the first try, and an attempt to login is made, but no username is filled in. Using the 1Password extension shortcut again will cause the username to be filled in and a successful login.
1Password Version: 6.8.7 (687006)
Extension Version: Not Provided
OS Version: 10.13.3
Sync Type: Dropbox