OpenAPI query param setting `allowReserved` is not supported

Issue

When defining a query parameter with allowReserved: true the query parameter will be encoded as well.
Documentation: link

Example

  /rest/organizations:
    get:
      …
      parameters:
        - name: ids
          description: |
            Organization IDs as comma separated list in List(…) format.
            It is important that this parameter is not URL encoded.
          in: query
          example: List(79988552,27056405)
          schema:
            type: string
          required: true
          allowReserved: true

Actual

rest/organizations?ids=List%2879988552,27056405%29

Expected

rest/organizations?ids=List(79988552,27056405)

Notes

I know this is not a proper API design. Unfortunately this is a third party api which we have to use.