lua TXN.set_tos not work

[神楽坂玲奈]

I have this in config file

listen railgun
    option                  transparent
    bind *:5000 transparent
    server main *
    source *
    tcp-request content lua.test
    tcp-request content reject if LOCALHOST

and this in .lua

core.register_action("test", { "tcp-req", "http-req" }, function(txn)
   txn:Info("test")
   txn:set_mark(0x10)
   txn:set_tos(0x10)
end)

then run

sudo haproxy -f /etc/haproxy/haproxy.cfg -d

and it successfully prints "test" on each connection, but i see every
packet TOS is 0, not 0x10. same for mark.

HAProxy 1.6.1