So I got bit by the new app last night.
Was looking at the flight status page and saw that AC114 which I am flying today was cancelled. So, I call a less than stellar concierge and I figured out that there had been a equipment swap, as the flight number was now AC2114. This, any many other things, was news to the concierge. But that's a different rant.
The app has still not updated my iten to reflect the new flight number. So for a FOTSG (and almost me) it still looks like there's big problem with this trip.
I don't recall if the 'old' app updated flight numbers after booking but this one sure didn't for me. Interestingly, CheckMyTrip from Amadeus shows all of the current information so AC can hardly blame their new rez system for this crap.
This is more of an annoyance than anything, but it makes rely on other sources of truth for sure, especially if I want to know the latest.