Mocked response has no body with HttpResponse.* methods

[SPH-0gJo]

I was trying to test some handler using fetch() and noticed that when I set the body in the handler with HttpResponse.text() or HttpResponse.json() didn't get any body in response I thought fetch() was the cause and tested fetch() with setupWorker(). response.body is undefined and response.text() in fetch callback only prints "" (empty string) in jest code.
The only thing which is missed was response body. The other response property I had configured like statusText existed well.
I am using

• node 18.15.0
• msw 2.0.11
  I've created an repository which reproduces this problem

You can find test code in App.test.tsx and msw handler in handler.ts.
So, my question is: Where does the body disappear to and how to preserve it?