hi clyde, i did a test:

if i sign up with the country USA , UK or others, on returns page, the contact information automatically filled.

if i sign up with the country France, the information couldnt be automatically filled. even if i change the principal address to USA after i sign up, the information on return page still cant be filled automatically.

ps: france is the default country

then i nothice there isn't a country field on the returns page ?