I thought I had read that there was a keyboard shortcut to fill only the active field on a page but can't seem to find it at https://support.1password.com/keyboard-shortcuts/.
Command + \ seems to fill all related fields and sometimes incorrectly.
Today 1Password filled my phone number on stage-2 of the Do Not Call Registry complaint page when I tried to fill my address -- overwriting the offending number I had just typed at https://complaints.donotcall.gov/complaint/complaintcheck.aspx. I did see and correct the mistake before reporting myself.
Thanks for any information or work around you have to offer.
1Password Version: 6.8.7
Extension Version: 184.108.40.206
OS Version: OS X 10.12.6
Sync Type: Not Provided