v3.0 (bug?) - swagger compliance assertion fails in v3.0 but is ok in v2.8

Hi,

I recently update to v3.0 of readyAPI. Looks nice!

However, I notice a difference in behavior on the Swagger Compliance Assertion. Might this be a bug at your end or is this assertion suddenly more strict in the v3.0? And if the latter, why does it flags this a failure?

Scenario:

Applying swagger compliance assertion to a rest response. In the assertion, I have a swagger url which contains a relative path to a yaml file. Strict validation is enabled (disabling this makes no diffrence to this issue). The validation happens and provides now these failures (note: some items are renamed for privacy reasons):

1) Instance failed to match all required schemas (matched only 0 out of 1) checked node: [/references] corresponding schema: [/properties/references]

If this is a valid assertion failure then it is not a clear error message in my opinion. In my JSON response I get back the following for the reference node:

Response of my usedResource:

   "references" : {
      "aReference" : "93269491-e89b-4f19-9d12-ec09b71aeaec",
      "bReference" : null,
      "cReference" : null
   }

Is the error saying that bReference and cReference cannot be null? In my swagger/yaml file reference is defined as: 

  usedResource:
    type: object
    description: Description of the request
    properties:
...
       references:
          readOnly: true
           description: References description
           allOf:
             - $ref: '#/definitions/ourReferences'
...
...
ourReferences:
    type: object
    description: Contains the references
    properties:
      aReference:
        type: string
        description: The reference a 
      bReference:
        type: string
        description: The reference b
      cReference:
        type: string
        description: The reference c

2) Instance type (string) does not match any allowed primitive type (allowed: ["object"]) checked node [/priority] corresponding schema [properties/priority]

In my JSON response I get back the following for the reference node:

Response of my usedResource:

"priority" : "NORMAL"

In my swagger/yaml file priority is defined as: 

usedResource:
    type: object
    description: Description of the request
    properties:
...  
    priority:
        description: The urgency.
        allOf:
          - $ref: '#/definitions/RequestPriority'
...
  RequestPriority:
    type: string
    enum:
      - NORMAL
      - URGENT

I cannot see what's wrong with this. Other similar nodes with similar type & enum are not resulting in a failure. Again, also v2.8 did not flag this as a failed compliance.

I could provide more examples, but I hope these suffice.