In an update to last week’s Facebook for Business post–which detailed fixes to metrics affecting estimated reach, Reactions counts on posts and a discrepancy involving its like and share buttons—the social network wrote:
We’ve uncovered an issue for a small group of Instant Articles publishers that impacts reporting in comScore. comScore alerted us to the issue, and we’ve since identified that this is a result of a recent Facebook update that impacted publishers using our legacy comScore integration that support HTTPS on their websites. This caused an underreporting of iPhone traffic from Facebook in comScore products between Sept. 20 and Nov. 30, 2016. iPad and Android traffic were not affected. We have fixed the issue and are working with comScore to produce updated estimates for the relevant time periods for the small group of partners affected. We have reached out to affected publishers.
Readers: What are your thoughts on the latest Facebook metrics glitch?