Why is my request property getting an empty array when using content type application/json-patch+json?

Question

I have a PATCH operation that takes a request body of content type application/json-patch+json. Example request body:

{
  "operations": [
    {
      "op": "remove",
      "path": "/blah"
    }
  ]
}

When I hit the API, my server is getting an empty operations array in the request body. However if I switch the accepted content type to application/json and use that for the request, I get a populated array.

I have tried not having an operations property and just an array but that causes an error with our API validator.

Does anyone know what it is about application/json-patch+json that's causing this?