Referencing path parameters declared in Domains

Hi,

I can't seem to resolve an error in the SwaggerHub UI.

I have a parameter declared in a domain:

parameters:
  someParameter:
     name: someParameter
     description: a parameter
     in: path
     required: true
     schema:
        type: string

and I reference it in an API definition:

/path/{someParameter}:
    parameters:
      - $ref: 'https://api.swaggerhub.com/domains/mydomain/1.0.0#/components/parameters/someParameter'

But I cannot resolve the error:

"Declared path parameter 'someParameter' needs to be defined as a path parameter at either path or operation level"

The documentation renders perfectly and if I move the parameter definition into the API definition and reference it locally the error disappears.

Is this just a bug in the UI or am I missing some detail?

Thanks