error log: upgrading cnx to websocket: hyper::Error(IncompleteMessage)

[yylt]

Describe the bug

client had ESTABLISHED with server, but server have many error log

wstunnel[147640]: 2025-11-12T05:49:49.442110Z ERROR wstunnel::tunnel::server::server: Error while upgrading cnx to websocket: hyper::Error(IncompleteMessage)
wstunnel[147640]: 2025-11-12T06:04:09.989645Z ERROR wstunnel::tunnel::server::server: Error while upgrading cnx to websocket: hyper::Error(IncompleteMessage)
wstunnel[147640]: 2025-11-12T06:04:16.140981Z ERROR wstunnel::tunnel::server::server: Error while upgrading cnx to websocket: hyper::Error(IncompleteMessage)
wstunnel[147640]: 2025-11-12T06:14:16.284403Z ERROR wstunnel::tunnel::server::server: Error while upgrading cnx to websocket: hyper::Error(IncompleteMessage)
wstunnel[147640]: 2025-11-12T06:32:38.303959Z ERROR wstunnel::tunnel::server::server: Error while upgrading cnx to websocket: hyper::Error(IncompleteMessage)
wstunnel[147640]: 2025-11-12T06:42:39.522389Z ERROR wstunnel::tunnel::server::server: Error while upgrading cnx to websocket: hyper::Error(IncompleteMessage)

the server is behind nginx, and running with no-tls.

To Reproduce

1. run server behind nginx
2. run client, and connect server directly.

Expected behavior

• no error log print

Your wstunnel setup

Paste your logs of wstunnel, started with --log-lvl=DEBUG, and with the command line used

• client

wstunnel client --log-lvl WARN -R tcp://8443:127.0.0.1:8443 wss://example.com:443

• server

wstunnel server --log-lvl WARN ws://127.0.0.1:3459

• nginx config:

    location / {
		proxy_http_version                 1.1;
		proxy_cache_bypass                 $http_upgrade;

		proxy_http_version 1.1;
		proxy_set_header Upgrade $http_upgrade;
		proxy_set_header Connection "upgrade";

		# Proxy timeouts
		proxy_connect_timeout              60s;
		proxy_send_timeout                 60s;
		proxy_read_timeout                 60s;
		
        proxy_request_buffering     off;
        proxy_buffering     off;
        proxy_pass    http://127.0.0.1:3459;
    }

Desktop (please complete the following information):

• Linux 5.15.0-157-generic x86_64 x86_64 x86_64 GNU/Linux

Additional context
Add any other context about the problem here.