Hello Daniel,
Thanks for using our plugins and welcome to the forums!
I’m sorry about your issue with Event Aggregator. Let me try to help you with that.
If I understand correctly, you have 3 sites setup up in the same multi-site environment.
Facebook started now working on one, but 2 are still stuck.
What you can try to do is remove the authorization of Event Aggregator from Facebook for all 2 sites. Then re-authorize them one-by-one and see if that solves it.
Let me know how that works out.
Cheers,
Andras