Browse list of users(admin/user.php) May show users with the same name across pages, but not another user instead.

This problem occurs when there are users with the same firstname or lastname. However, it may be displayed normally, and the result may change after several operations.

Example:

[Original user data]
Joe Bloggs
Joe Smith
John Smith

[User list]
Page: 4
-
-
-
Joe Bloggs

Page: 5
Joe Bloggs
John Smith
-
-
-

"John Smith" disappears and "Joe Bloggs" appears twice when the same firstname user crosses the page.

2020/3/10 add
This problem is occurring with postgres (9.6.3)

The occurrence conditions that can be confirmed at present are as follows.
When there is a user with the same first name in Japanese, a problem occurs at the beginning of the page when ascending the first name. Or, if there is a user with the same last name in Japanese, a problem occurs at the top of the page when ascending the last name.

This issue occurs only in the environment where the service is actually used, and screenshots cannot be prepared because they contain sensitive information. If it can be reproduced in the verification environment in the future, add a screenshot.