Add a space between last name and first name in Japanese environment

When iOS's language setting is English, user name which was selected by name lookup is shown as "First name + space + Last name" in To field of new mail.
For example, "test user01" is shown as "test user01" in To field of new mail.

(Refer to 01.jpg)

However, when iOS's language setting is Japanese, user name which was selected by name lookup is shown as "Last name + First name" in To field of new mail.

For example, "test user01" is shown as "user01test" in To field of new mail.
There should be a space between last name and first name like "user01 test" to avoid confusion.

(Refer to 02.jpg)

<Environment>
Domino: 10.0.1
Traveler: 10.0.1.2
Verse for iOS: 10.0.7