Hash rate always is 0 kh
Hello author.
I try install xmrig-proxy in some server but i always fall, Proxy server show me 0.00/kh 

I test on simple config
          "tls": false
        }
    ],
    "colors": true,
    "custom-diff": 0,
    "donate-level": 0,
    "log-file": null,
    "mode": "simple",
    "pools": [
        {
            "algo": "null",
            "coin": "xmr",
            "url": "pool.minexmr.com:4444",
            "user": "xxx",
            "pass": null,
            "rig-id": null,
            "keepalive": false,
            "enabled": true,
            "tls": false,
            "tls-fingerprint": null,
            "daemon": false
        }
    ],
    "retries": 2,
    "retry-pause": 1,
    "reuse-timeout": 0,
    "tls": {
        "protocols": null,
        "cert": null,
        "cert_key": null,
        "ciphers": null,
        "ciphersuites": null,
        "dhparam": null
    },
    "user-agent": null,
    "syslog": false,
    "verbose": false,
    "watch": true,
    "workers": true

and this is my screenshot on server and worker
[https://imgur.com/4ZAEmst](https://imgur.com/4ZAEmst)
[https://imgur.com/4gmB0xJ](https://imgur.com/4gmB0xJ)
