get_cgroups_info doesn't update gen_server state

For CBSE-16584 the cgroup stats for one of eight nodes wasn't getting computed (always zero). Restarting the ns_server sigar_port process resolved the issue.  As part of the investigation I see this code in sigar.erl

handle_call(get_cgroups_info, _From, State) ->

    NewState = maybe_update_stats(State),

    {_, _, CGroupsInfo} = NewState#state.most_recent_unpacked,

    {reply, CGroupsInfo, State};

Note the reply uses "State" rather than "NewState". However, as the computed CGroupsInfo is returned I don't see how it leads to the observed behavior.