I updated my password on vistaprint.com to a longer password. When 1Password (desktop Mac) tries to log in to the website, the login fails.
I can see that the password (dots) appears to be shorter than the new password. If I go up to the browser or mini 1P icon and copy the new password and enter it on vistaprint, it will let me log in. 1P isn't entering the password correctly even though it has the correct password.
I tried this on an iPad and an iPhone and 1P will not fill in either the vistaprint username or password on 1P's internal browser.
1Password Version: 6.6.1
Extension Version: 4.6.3
OS Version: 10.11.6
Sync Type: via Dropbox