Unusual autofill situation

So on Delta.com, to log in you have to fill out fields for Username, Last Name, and Password.

However, the "Last Name" field doesn't appear until you start inputting your username. This seems to be because the Last Name field doesn't appear at all if you input your account number instead of username.

The problem then is 1Password doesn't autofill the Last Name field. This is even if I used the "Save Login" option, so it does have all 3 fields saved. It will only fill the Last Name field after hitting 'AutoFill' after the field has appeared.

I know it's a sort of unique situation but figured there is a way to account for it, because I know that on some websites like Adobe.com, 1Password will still autofill the password even though the Password field only appears after entering a username.

_1Password Version: 1Password for Windows 8.10.16 (81016047)
_Extension Version: 2.15.1
_OS Version: Windows 11 22H2
_Browser: Google Chrome Version 116.0.5845.188