Hi there Sean,
Thanks for getting in touch with us! I don’t think there has been a recent change in the codebase, the actual product version is 4.2 release 06/08/2016.
I think the Facebook API might be restricting those events from being imported. As the Facebook add-on page states: “Please also note: You may not be able to import events that Facebook deems adult in nature, including breweries, bars, night clubs, and adult entertainment. The Facebook API dictates that only public, unrestricted events are importable at this time.”.
Do you think this might be the case?
Please let me know about it,
Best,
Nico