Python client generated with 2.4.21 does not handle download of binary data (UTF-8 decode issue)

[IAmWebSA]

swagger: '2.0'
/get/zip:
    get:
      summary: Get a zip file
      description: Zip File
      produces:
        - application/octet-stream
        - application/json
      responses:
        '200':
          description: Zip File
          schema:
            type: file
        '401':
          description: Access denied 
        '403':
          description: Access forbidden 
        '500':
          description: Fatal Error

Error which I get when response is processed:

'utf-8' codec can't decode byte 0x9a in position 10: invalid start byte rest.py", line 222, in request

Failing code part in rest.py:

# we need to decode it to string. if six.PY3: r.data = r.data.decode('utf8')

Is there an error in my extract of the yaml?
Or is this still a bug in the codegen?

Many thanks in advance

[IAmWebSA]

This was fixed also at openApi-generator see: OpenAPITools/openapi-generator#5679

[HugoMario]

fixed by #932