Using both 1Password X, and Desktop Beta, I've noticed that password X browser will lock if you close the app.
Steps to reproduce:
Open Password X - Browser or via toolbar.
both unlocks, Open Password App from Application folder.
1Password Version: 1Password 7 Version 7.3.2.BETA-0 (70302000) 1Passw
Extension Version: 1.16.4
OS Version: 10.15 Beta
Sync Type: 1Password