Password removed from textbox

When logging in, under certain conditions the password will vanish from the textbox when focus is lost

In Chrome, with an account where the details have been saved by chrome

1. Enter your account email
2. Click continue
3. Click back on your account name
4. Click continue again
5. Click on the password textbox
6. Select "use password for {account email address}
7. Click anywhere on the screen, including the login button (but excluding the account) and the password is removed from the textbox