Member Name sorting in user group not working

What steps does it take to reproduce the issue?

1. As a superuser or curator, navigate to a (sub-)dataverse which has user groups with multiple members.
2. Click Edit and select Groups.
3. Click the Edit button of a group with multiple members.
4. On the column heading Member Name, click the arrow button.

• When does this issue occur?
  When trying to sort the members of a user group.

• Which page(s) does it occurs on?
  In the group management window.

• What happens?
  Nothing, i.e. no sorting is carried out.

• To whom does it occur (all users, curators, superusers)?
  Curators, superusers

• What did you expect to happen?
  The list of group members being sorted alphabetically.

Which version of Dataverse are you using?
I tested this in our test environment on v6.2 and on demo.dataverse.org on v. 6.2 build "v6.2+10451+10463+10383-iqss"

Any related open or closed issues to this bug report?
Not that I know of.

Screenshots:

Start by reproducing the issue in the group management window using a user group with multiple members, then trace the Member Name column and its sorting control. The work is done when clicking the column arrow sorts members alphabetically for curators and superusers, with the behavior verified in the affected interface.