Passing FetchTransport in transport disable calls to collector

[kumarldh]

I am trying to send a custom header to my collector. This header is required for some reason I can not disclose here. However, using FetchTransport in transports simply stop sending requests to collector. Here is my set up

  transports: [
    new FetchTransport({
      url: 'https://my-domain-com/collect',
      requestOptions: {
        headers: {
          'my-custom-header': '16a7af77696199f3dc47a2ae4107d2b5',
        },
      },
    }),
  ],

Not sure what is wrong? For now I am going to fork the repo and get it out.