Problem connecting to Go based grpc server

[finalclass]

Greeter example in this repo works fine as long as both client and server are implemented in OCaml.
I tried implementing the server in Go: https://github.com/finalclass/greeter-grpc-example (you can run it with make run)
and then run the greeter_client_eio.exe World but it hangs.

Trying the same with a JS based client works fine (the JS client is included in the go example repository). This suggests that there might be something different in the ocaml's/eio's implementation of client.

I'm attaching a gif with demo of the issue