Broker diagram does not show anything in Fuse Console

Using the latest version of Fuse Console Operator 7.11 and deploying a Fuse Console with the following CR:

apiVersion: hawt.io/v1alpha1
kind: Hawtio
metadata:
  name: dsp-fuse-console
spec:
  auth: {}
  config:
    about: {}
    branding: {}
    online:
      consoleLink: {}
  nginx: {}
  rbac: {}
  replicas: 1
  type: Namespace
  version: '1.11' 

The Fuse Console shows successfully the AMQ Brokers and allows connecting them. However, the Broker Diagram does not show anything:

No error messages in the Fuse Console pod or in the web browser.

Tested with Firefox and Google Chrome.