Facebook team has restored the affected services, and we have also received confirmation from a couple of customers that private messages are flowing normally. We are considering this incident resolved now.
As always, please feel free to reach the Khoros Support team in case any assistance is needed.

We continue to wait for an update from the Facebook team, and we will keep you posted when we hear back.

We are experiencing the same behavior for the Marketing platform as well, we are tracking the status of the FB bug, and we will keep you posted.

We observe that Facebook Private messages are ingesting into Care with a delay intermittently from the Facebook side.
We are tracking the bug reported on the Facebook page below and will keep you updated on the progress.
Bug link: https://developers.facebook.com/support/bugs/523185905463696/?join_id=f3a27fa9a8bd50c