The "as Hamilton was entering Parabolica" came from this Autosport article:
https://www.autosport.com/f1/news/15...ed-pit-penalty
That, however, says that "When the pitlane closed decision was made and the safety car called out, Hamilton was already approaching Parabolica" which contradicts the previous article I quoted and I conflated the two.
(BTW I agree with the conclusion that the team was ultimately at fault, I'm not trying to argue otherwise)