Nested structs in query params fail to encode

[WarningImHack3r]

Such a YAML endpoint fails to encode on client request invocation, leading to a error formatting 'param_id': unsupported type Header error with a nested struct:

...
paths:
  /my/endpoint:
    post:
      security: []
      operationId: myOpId
      parameters:
        - name: param_id
          in: query
          style: form
          schema:
            $ref: "#/components/schemas/ParentStruct"
...

with ParentStruct being generated like:

type ParentStruct struct {
   Header Header `json:"header"` // a simple struct with a few fields
}

(I don't own and can't modify the YAML, I know such a use case is very unconventional)

Call stack:

// my code
client.MyEndpointWithResponse
  // generated code
  c.MyEndpoint(ctx, params, reqEditors...)
    NewMyEndpointRequest(c.Server, params)
      // starting from here we're inside `styleparam.go` from this repo
      runtime.StyleParamWithLocation("form", true, "param_id", runtime.ParamLocationQuery, *params.ParamId)
        styleStruct(style, explode, paramName, paramLocation, value)
          primitiveToString(value) // <-- value is my Header here
            // inside this function, it correctly passes into the `case reflect.Struct`, but fails because it doesn't conform to `uuid.UUID` nor to `json.Marshaler` (for some reason)
            // as a result, it `fallthrough`s in `default:` and also fails the conformity check to `fmt.Stringer`, leading to the error.

I didn't inspect the code that much, but I fail to understand why the serialization process uses the custom reflection logic instead of simply using json.Encode which would 100% do the job.

Thank you in advance!