I had edited a note on a login item within the 1Password for Mac app. I had not saved this yet. I then was accessing the corresponding website for this login item, where I updated the password. Upon submitting the new password on the webpage, I was prompted by the browser 1PW extension to update this existing login item.
While that prompt was pending, I saved the note in the 1PW desktop application. Then, I chose to have the 1PW Safari extension update the login item. This did successfully update the password. However, it lost the changes I had made to the login item note and just saved.
This seems to be a bug in how the data is handled.
1Password Version: 5.4.1
Extension Version: 4.4.4
OS Version: OS X 10.11.2
Sync Type: Dropbox
Referrer: forum-search:note update overwritten by browser plugin