Customer info are not auto-populated correctly in admin creating a new order

[kennyadsl]

When use_combined_first_and_last_name_in_address is set to false, creating a new order in admin, in the customer tab, it is not populating First Name and Last Name fields when you pick an existing customer from the autosuggestion dropdown.

Solidus Version:
v2.11.4

To Reproduce

1. Install Solidus at the specified version,
2. Change use_combined_first_and_last_name_in_address to false in spree.rb initializer
3. Login in the admin panel
4. Go to Orders and click New order
5. Click Customer tab
6. Select any user
7. First Name and Last Name are not populated

Expected behavior
First Name and Last Name fields of the auto-populated address are not filled with customer's info and left blank.

Screenshots

[cesartalves]

@kennyadsl there's a linked PR that seems to reference this issue. Perhaps you could take a look and close this one if the problem is already fixed? Or is there any other additional code needed here?

[kennyadsl]

@cesartalves We can definitely close this one. Thanks!