Missing "grpc-status" header

[ErikUniformAgri]

I am using TgoHttpClient with http2 as a client to connect to a gRPC server.
The connection works fine, but if I do a a bad request there is no error. The statuscode is still 200.
gRPC uses a grpc-status and grpc-message header, but I am not able to use this header since it is filtered out for some reason.

I found that if I change frame.headers.cat = NGHTTP2_HCAT_RESPONSE to (frame.headers.cat in [NGHTTP2_HCAT_RESPONSE,3]) I do get the correct headers. on https://nghttp2.org/documentation/enums.html#c.nghttp2_headers_category I found what 3 means and
on https://github.com/ultraware/DelphiGrpc/tree/master/ngHttp2 I found there is constant declared for this.

function TgoHttpClient.nghttp2_on_header_callback(session: pnghttp2_session; const frame: pnghttp2_frame;
  const name: puint8; namelen: size_t; const value: puint8; valuelen: size_t;
  flags: uint8; user_data: Pointer): Integer;
var
  AName, AValue: String;
  Index: Integer;
begin
  {$IFDEF LOGGING}
  grLog('on_header_callback');
  {$ENDIF}
  if frame.hd.&type = _NGHTTP2_HEADERS then
    if (frame.headers.cat in [NGHTTP2_HCAT_RESPONSE,3]) then
    begin
      .....
    end;
end;

Example from https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md.

HEADERS (flags = END_HEADERS)
:status = 200
grpc-encoding = gzip
content-type = application/grpc+proto

DATA
<Length-Prefixed Message>

HEADERS (flags = END_STREAM, END_HEADERS)
grpc-status = 0 # OK
trace-proto-bin = jher831yy13JHy3hc

Is the solution to update https://github.com/grijjy/DelphiRemotePushSender with https://github.com/ultraware/DelphiGrpc/tree/master/ngHttp2 and use NGHTTP2_HCAT_HEADERS instead of the hardcoded 3 ?