Proxy over HTTP3 doesn't work

[avilabss]

client := req.C()
client.EnableHTTP3()
client.EnableForceHTTP3()

client.SetProxyURL("socks5://<user>:<pass>@<host>:<port>")

HTTP3 works perfectly fine when the proxy is not set. When set, the HTTP3 stops working.

Does proxy support UDP? Yes!