Password managers for Chrome, Firefox and Edge can conflict with 1Password.  It is recommended to disable the browser-based password manager.  

To disable Chrome’s password manager:

https://support.1password.com/disable-browser-password-manager/#chrome

To disable Firefox’s password manager:

https://support.1password.com/disable-browser-password-manager/#firefox-windows

To disable Edge’s password manager:

https://support.1password.com/disable-browser-password-manager/#microsoft-edge-windows