I am afraid you misinterpreted my post or deliberately tried to show your self-proclaimed ACARS "knowledge" to this community disqualifying my statement
@barrelowl: I see a lot of uninformed comments here, including yours:
I conclude that the ACARS downlink feed from the aircraft completely stopped at some point
How do you know there is a "downlink feed"? In my airline if all is ok there is only an engine trending downlink around TOC and nothing else for the rest of the flight.
How does it work at MAS? I have no idea, do you?