It is very fortunate that it wasn't a zero-day then! I'm not sure if it was a "scramble" since it sounds like from the ticket it was ignored until the deadline

It is very fortunate that it wasn't a zero-day then! I'm not sure if it was a "scramble" since it sounds like from the ticket it was ignored until the deadline got close... although it would be interesting to see the activity on Microsoft's internal bug tracker.