I was trying to change my email address to a Masked email. When I selected the option in the dropdown to Create Masked Email..., it generated one for me and let me autofill it. But it never offered to save it for me anywhere. I expected it to offer to save it in the website's login item, either to update the username or store it as an email field.
1Password Version: 8.9.12 80912004 (Beta)
Extension Version: 2.5.1
OS Version: macOS 13.1