Facebook admits month-long 'discrepancy' in reported reach, engagement metrics

If the reach and engagement metrics you’ve seen on your Facebook page seem a little off, it’s because there’s been a bug affecting those figures. Facebook admitted to many page owners today that there is a discrepancy between the reported reach admins see on posts and the actual reach and engagement of a post.

Many page admins can see this message atop the dashboard:

There is a discrepancy in the engagement and reach metrics for all Page Posts and Boosted Posts between 5/30 and 6/30.