I don't disagree with you, but I think generally when the mistake involves compromised user data, the answer is a bit more emotionally driven. People get rightfully mad when things like that happens, and services usually keep the incident in a "Mitigated" status while they "work with their customers to ensure blah blah blah" or whatever. Everywhere I've personally worked the Mitigated->Resolved involves publishing a postmortem, repair items, and general assurances or safe guards based on learnings from the incident that the issue won't happen again. However, the industry as a whole doesn't have a standard for what the line between Mitigation and Resolution is.

So the active incident is now fixed and they've already reached out to impacted customers but they can't mark it as resolved yet because they are still yet to publish a more detailed blog post?