I've got 7 credit cards in my stand alone vault. Half of them are have "Expiry Date" field saying "This field is not supported by this version of 1Password". Yet the other have is showing Expiry Date without issue.
Edit - also happening for my drivers license (only one of those unfortunately)
1Password Version: 7.0.541
Extension Version: Not Provided
OS Version: Win10
Sync Type: Dropbox