Proxy Protocol trouble with haproxy and traefik

I have HAproxy configured to send proxy protocol headers to traefik and I cant get it to work.
It looks like traefik is not using the proxy protocol even when configured in traefik.toml

Using traefik 1.7.19-alpine running in k8s, and haproxy outside k8s to load balance worker nodes on port 443. SSL is terminated in k8s in the traefik ingress controller.

My traefik.toml seems to have all config needed, like forwardedHeaders and proxyProtocol

  address = ":443"
      insecure = true
      trustedIPs = [""]
      insecure = true
      trustedIPs = [""]
      CertFile = "/ssl/tls.crt"
      KeyFile = "/ssl/tls.key"

And HAProxy configuration is configured to send proxy headers with send-proxy

backend https-backend
  mode tcp
  balance roundrobin
    server worker1 check ssl verify none send-proxy
    server worker2 check ssl verify none send-proxy
    server worker3 check ssl verify none send-proxy

But Firefox error says SSL_ERROR_RX_RECORD_TOO_LONG if I try to send with proxy protocol v1 from haproxy, and with v2 from haproxy Firefox says instead PR_END_OF_FILE_ERROR and the traefik logs in this case says tls: first record does not look like a TLS handshake","time":"2019-11-23T11:01:43Z"}

Any advice what could be wrong? I dont see any obvious errors in my configuration.

found one problem with my haproxy config ssl verify none should not be present for ssl passthrough, but still not got my traefik accepting the headers.

Seems like haproxy when set with config below is working for proxy protocol v1, and the original config for traefik mention in original post above.

backend https-backend
  mode tcp
  balance roundrobin
    server worker1 check send-proxy
    server worker2 check send-proxy
    server worker3 check send-proxy

when adding send-proxy-v2 to the haproxy config, Firefox replies with error PR_END_OF_FILE_ERROR.

Does traefik v1.7 support version 2 of proxy protocol?