I think this is the "postmortem" he's referring to: https://developers.facebook.com/blog/post/2020/07/13/bug-now-resolved-fb-ios-sdk-outage-causing-disruption-t

I think this is the "postmortem" he's referring to: https://developers.facebook.com/blog/post/2020/07/13/bug-now-resolved-fb-ios-sdk-outage-causing-disruption-third-party-ios-apps/ https://developers.facebook.com/blog/post/2020/07/13/bug-now... > Last week we made a server-side code change that triggered crashes for some iOS apps using the Facebook SDK. We quickly resolved the issue without requiring action from developers.