"Nor has the FAA provided specifics on what transpired other than offering a generic statement: “We will continue working with SpaceX to resolve outstanding safety issues before we approve the next test flight.”"
So unless I'm mistaken, it doesn't seem that the FAA has released any details on what was violated.
My cynical guess: this was a "Elon just Tweeted something angry/cryptic, lots of people will be trying to figure out what's going on, so let's quickly write something about it" kind of article.
"Nor has the FAA provided specifics on what transpired other than offering a generic statement: “We will continue working with SpaceX to resolve outstanding safety issues before we approve the next test flight.”"
So unless I'm mistaken, it doesn't seem that the FAA has released any details on what was violated.
[0] https://arstechnica.com/science/2021/01/whats-really-going-o...