Thanks for your reply.
I tried running v2rayN on my other machine on the same local network, still same result.
However, I can see a 190 byte length WireGaurd packet in WireShark has sent from my primary device.
In intense DPI restricted environments (e.g. China, Iran), SOCKS5 is long gone. No VPN/Proxy protocol is actually working other than Trojan or VLESS/VMESS.
It’s very nice if we see built-in support for other obscured proxies in near future.
Off topic:
Your website blocked in my country, so I need VPN to access it.
Your web server also disallows to accept a post or comment from any kind of non-personal IP address.
I had a really hard time to overcome this issue!