I just updated to 1password version 7.3 and see that a bug that existed one year ago in version 7.0 is back in a slightly different form.
Safari is set to my default browser. The bug occurs when I go to a browser other than safari, ie. Brave, Vivaldi, Firefox.
a. make sure 1password7 is unlocked. can be unlocked I guess.
1. Open Brave ( you can replace brave with Vivaldi, or Firefox. I am sure it will happen with any browser)
2. go to www.somewebsite.com
3. use keystroke -> "command \" to pull password
4. do whatever on somewebsite
5. logout of somewebsite
6. quit brave
7. lock 1password7
8. unlock 1password7
At this point the bug happens by opening the last web page login in the default browser. in this case, safari.
I have not tried this, but I am sure that if I quit safari in step 6 that safari will open to the last login page.
Also, this does bug does not occur if you remove step 6 and leave the other browser open.
awaiting 7.3.1 bug fix...
1Password Version: 7.3
Extension Version: 7.2.6
OS Version: 10.14.5
Sync Type: null