proxy works only with certain clients

[Naadiyaar]

Hello everyone
I have recently set up a xray proxy based on vless and grpc as transport. there's no TLS in xray setup and it's all handled by application proxy (in this case Traefik).
I imported this proxy in the android client V2rayNG and everything works properly. but the problem starts when I'm trying to use the exact same configuration on other clients or devices. for example exporting this proxy into another Android device also running V2rayNG (both same version) it doesn't work anymore, and no data is sent to server.
This not V2rayNG's particular problem, since I can't get it to work on my laptop using Xray cli either.

server configuration:

{
    "log": {
        "loglevel": "warning"
    },
    "dns": {
        "servers": ["1.1.1.1"],
        "tag": "dns-query"
    },
    "inbounds": [
        {
            "listen": "127.0.0.1",
            "port": 10808,
            "protocol": "vless",
            "settings": {
                "clients": [
                    {
                        "id": "🙂" // UUID
                    }
                ],
                "decryption": "none"
            },
            "streamSettings": {
                "network": "grpc",
                "grpcSettings": {
                    "serviceName": "grpc" // ServiceName
                }
            }
        }
    ],
    "outbounds": [
        {
            "tag": "direct",
            "protocol": "freedom",
            "settings": {}
        },
        {
            "tag": "blocked",
            "protocol": "blackhole",
            "settings": {}
        }
    ],
    "routing": {
        "domainStrategy": "AsIs",
        "rules": [
            {
                "type": "field",
                "ip": [
                    "geoip:private"
                ],
                "outboundTag": "blocked"
            }
        ]
    }
}

and client configuration:

{
    "log": {
        "loglevel": "debug"
    },
    "dns": {
        "servers": ["8.8.8.8"],
        "tag": "dns-query"
    },
    "inbounds": [
        {
            "address": "127.0.0.1",
            "port": "12335",
            "protocol": "socks",
            "settings": {
                "auth": "noauth",
                "udp": true
            }
        },
        {
            "address": "127.0.0.1",
            "port": "12334",
            "protocol": "http",
            "settings": {
                "auth": "noauth",
                "udp": true
            }
        }
    ],
    "outbounds": [
        {
            "protocol": "vless",
            "settings": {
                "vnext": [
                    {
                        "address": "🙂",
                        "port": 443,
                        "users": [
                            {
                                "id": "🙂",
                                "encryption": "none"
                            }
                        ]
                    }
                ]
            },
            "streamSettings": {
                "network": "grpc",
                "security": "tls",
                "grpcSettings": {
                    "serviceName": "grpc"
                },
                "tlsSettings": {
                    "serverName": "🙂",
                    "show": false
                }
            }
        },
        {
            "tag": "direct",
            "protocol": "freedom",
            "settings": {}
        },
        {
            "tag": "blocked",
            "protocol": "blackhole",
            "settings": {}
        }
    ],
    "routing": {
        "domainStrategy": "IPOnDemand",
        "rules": [
            {
                "outboundTag": "direct",
                "domain": [
                    "geosite:ir"
                ],
                "type": "field"
            },
            {
                "outboundTag": "direct",
                "ip": [
                    "geoip:ir",
                    "geoip:private"
                ],
                "type": "field"
            }
        ]
    }
}

the only error I could see in xray output is this
2025/07/07 16:21:27.555340 [Error] transport/internet: failed to resolve ip > app/dns: returning nil for domain net.🙂.com > context deadline exceeded

Also I couldn't find any problem regarding of this setup using curl dig and ping and all outputs and results seems completely normal.

any ideas what's the problem?
thanks in advance