I'm sorry for the delayed response.
Can you please try configuring the Page Plugin using the Facebook developer site similar to how you have it configured within JFBConnect:
developers.facebook.com/docs/plugins/page-plugin/
Once configured, test if the faces show how you'd expect on their site. If so, let us know the configuration options you've chosen and we can double-check that something hasn't changed for the plugin parameters.
If it doesn't work there, there's not much we can do. Either it's a bug with Facebook or the expectation for show faces isn't correct. We can gladly help clarify how it should work if needed.
Thanks,
Alex