The value of the bound attribute in socket-binding-group messaging is always false

/socket-binding-group=standard-sockets/socket-binding=messaging:read-resource(include-runtime=true, recursive=true)
{
    "outcome" => "success",
    "result" => {
        "bound" => false,
        "bound-address" => undefined,
        "bound-port" => undefined,
        "client-mappings" => undefined,
        "fixed-port" => false,
        "interface" => undefined,
        "multicast-address" => undefined,
        "multicast-port" => undefined,
        "name" => "messaging",
        "port" => 5445
    }