I click in a CC field in Safari 14.0.3. The Safari extension, oddly enough, says it's 7.7.1.BETA-6, whereas 1Password itself says it's 7.7.1.BETA-7.
I select Create a Privacy Card. The dialog pops up.
I give it a name, tell it to create a spending limit and set the Frequency to Forever. I click Create and Fill.
I get a dialog saying, "Click OK to create and fill a Privacy Card using 1Password on . I click OK.
I get a dialog saying, "Click OK to fill your 1Password item on . Note that the Privacy card creation dialog is still visible behind this one. It hasn't gone away, so that it's between the dialog and the credit card field on the web site. At this point, I am stuck in a loop; no matter whether I click OK or Cancel, the same dialog reappears. I have to close the whole page to get control back, and the Privacy card is not created.
Note that it doesn't actually matter whether I try to set a spending limit or not.
1Password Version: 7.7.1.BETA-7 (70701007)
Extension Version: 7.7.1.BETA-6
OS Version: MacOS 11.2
Sync Type: 1Password.com