Request matcher not working on grpc

[elpadrinoIV]

Describe the bug Trying to match with is + capture doesn't work

To Reproduce Steps to reproduce the behavior:

1. Tree structure:

./mocks
    |- /test
        |- Greeter
             |- SayHello.mock
./protos
    |- simple.proto
./config.yml

2. File content:

// simple.proto
syntax = "proto3";

package test;

service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply);
}

message HelloRequest {
  string name = 1;
}

message HelloReply {
  string message = 1;
}

// SayHello.mock
{{#is (capture using='jsonpath' selector='$.name') 'Bob' }}
{
  "message": "{{capture using='jsonpath' selector='$.name'}}"
}
{{else}}
{
  "message": "Not Bob, you are: {{capture using='jsonpath' selector='$.name'}}"
}
{{/is}}

// config.yml
...
  grpc:
    enable: true
    #host: localhost
    host: 0.0.0.0
    port: 4312
    mocks_dir: "./mocks"
    protos_dir: "./protos"
    grpc_tls: false

3. Run camouflage: docker run -d -p 4312:4312 -v $(pwd):/app --name camouflage shubhendumadhukar/camouflage
4. Hit endpoint with Bob:

grpcurl \
  -proto protos/simple.proto \
  -d '{"name": "Bob"}' \
  -plaintext \
  localhost:4312 \
  test.Greeter/SayHello
{
  "message": "Not Bob, you are: Bob"
}

5. Hit endpoint with Alice:

grpcurl \
  -proto protos/simple.proto \
  -d '{"name": "Alice"}' \
  -plaintext \
  localhost:4312 \
  test.Greeter/SayHello
{
  "message": "Not Bob, you are: Alice"
}

Expected behavior Step 4 should print a different message: { "message": "Bob" }.

The jsonpath is correct, because when returning the message, it correctly says "you are: Bob". However, the comparison doesn't seem to be working.

Additional context

2022-09-30 15:07:53 debug: Unary Request: {"name":"Bob"}
2022-09-30 15:07:53 debug: Mock file path: mocks/test/Greeter/SayHello.mock
2022-09-30 15:07:53 debug: Response: {
  "message": "Not Bob, you are: Bob"
}