Not work with Proxy IP v6

[caotangdaiduong]

I have topo:
LAN device ---> ([Linux OS + IP Table + Transock] + IPv4 Public) ---->Proxy HTTP (IP v4 connect) ---> IP v6 Public

Test proxy: curl https://ifconfig.co -x IPv4:PORT
resul IPv6: 2402:9d80:270:8e86:4aa:4de:a25:xx

but error log:
transocks error: "failed to connect to proxy server" client_addr="10.8.0.2:52583" dest_addr="142.250.179.206:443" error="proxy returns 502 Bad Gateway" request_id="1213d18b-60d3-5af1-905c-e57071d0144b" type="access" pid=3532214