The combined flair started to display in this week site icons from hidden accounts. For example, this is my current flair:
The freehand red circle shows a hidden community that you can't see in my Stack Exchange profile.
This issue looks to me as a privacy issue. Being associated with a SciFi community or Arqade is not a bad thing for my serious work-only profile, but it could be indeed an issue for people trying to hide association with a religious community due to the dark times that we are living on.