The app fills Address (2) with the same data as Address and doesn't fill the zip code at all. Coming from an Identity type record in my vault. All the data is in a single 1Password field named ADDRESS.
Normally, it is parsed correctly into individual fields in the form on other websites. Please take a look. This website is the government after all and they don't exactly attract the best software engineers.
1Password Version: 7.7.1 BETA 8
Extension Version: 184.108.40.206
OS Version: OS X 10.15.7
Sync Type: 1Password