The extension fills in passwords for other sites, so there is likely something unique about this one. I have opened a ticket, but haven't heard anything except the automated "humans are coming" reply several days ago. Anyone have any suggestions?
1Password Version: 6.8.9 (AgileBits store)
Extension Version: 22.214.171.124
OS Version: OS X 10.12.6
Sync Type: Dropbox