List of Users property does not work with Livetable list filter

Along with the display issue noted in XWIKI-7897, if a livetable tries to use a list of users property on some class, with a filterable 'list' type, the option values in the generated html select are correct (i.e. "XWiki.<user>") but the displayed selections are all '$l10n_value'. I suspect this is because the livetable macro uses

                #set($map = $class.get($colname).getMapValues())
                #foreach($listitem in $list)
                  #set ($l10n_key = "${propClassName}_${colname}_${listitem}")
                  #set ($l10n_value = $msg.get($l10n_key))
                  #if ($l10n_value == $l10n_key)
                    #set ($l10n_value = $map.get($listitem).getValue())
                  #end
                #end

but the Users.java class simply returns a new HashMap,

https://github.com/xwiki/xwiki-platform/blob/stable-4.1.x/xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/objects/classes/UsersClass.java

so $l10n_value is set to an empty value.