Until recently it was possible to use Safari to:
1. Go to BendigoBank.com.au
2. Click the Login button
3. Use the Cmd \ shortcut to load the username password
Now the Cmd \ shortcut no longer works in Safari - note the Cmd \ shortcut works fine in Firefox and Chrome.
A similar behaviour seemed to occur recently with the login popup for anz.com.au, but that now works.
All software and extensions up to date.
Using 1P Version 3.7.0 (build 31083)
Safari 1P Extension 3.7.b5