Elixir HTTP close connection error with Hackney {error: :closed}

Question

I am facing strange issue in my elixir app which is using Tesla as http client and Hackney as adaptor.

While making HTTP calls to external server, it intermittently result in error --> error: :closed. My application run inside pod and having istio sidecar proxy. I am using elixir 1.10, Tesla 1.3.3, hackey 1.15, Erlang/OTP 22.

Below is the configuration I am using to make post calls. Is anybody faced this issue and if yes then how he fixed it. What changes I should do to fix this intermittent issue.

hackney_options =
  if(insecure,
    do: [recv_timeout: timeout, ssl_options: [verify: :verify_none]],
    else: [recv_timeout: timeout]
  )

adapter = {Tesla.Adapter.Hackney, hackney_options}

client =
  headers
  |> middlewares(timeout, retry, should_retry)
  |> Tesla.client(adapter)