Memberlist search column sort issue for second and subsequent pages

[GL700Wing]

If I search the memberlist and then sort by one of the columns other than 'Name' (eg, 'Posts') when I click on a link for the second or subsequent pages the list that is displayed is the relevant page of members sorted by 'Name' instead of the relevant page of members sorted by the column I had selected on the first page (eg, 'Posts').

Note: The column sort issue only seems to occur when the memberlist is searched - when viewing the memberlist and sorting by a column the second and subsequent pages show the expected list of members.